Cystine and Cysteine Series-Nantong Dongbu Amino Ácido S.A.

The cystine and cysteine series are core derivatives of sulfur-containing amino acids, including natural amino acids, functionally modified products, and CBZ/BOC/FMOC-protected amino acids. With unique reactivity of sulfhydryl/disulfide bonds, they are widely used in pharmaceutical synthesis, biological reagents, food additives, cosmetics and other fields, featuring high biocompatibility, strong reaction selectivity and excellent coordination ability.

(1) Cystine and Cysteine Derivatives

No.	Product Name	CAS No.	Category & Application
1	S-Benzyl-L-Cysteine	3054-01-1	Pharmaceutical intermediate and peptide synthesis raw material, used for drug molecular modification and biological coupling reactions.
2	D-Cysteine	921-01-7	Chiral pharmaceutical intermediate, used for optically pure drug synthesis and bioactive molecule research and development.
3	N-Acetyl-L-Cysteine	7218-04-6	Pharmaceutical raw material and food additive, used for expectorant drugs, antioxidants and food preservatives.
4	L-Cysteine Hydrochloride Monohydrate	7048-04-6	Pharmaceutical raw material and cosmetic raw material, used for drug synthesis, skin care product antioxidant formulations and food nutrition fortifiers.
5	Diethyl L-Cystinate Dihydrochloride	22735-07-5	Pharmaceutical intermediate, used for peptide drug synthesis and organic reaction reagents.
6	L-Cystine Dihydrochloride	30925-07-6	Organic synthesis intermediate, used for drug molecular modification and fine chemical production.
7	S-Trityl-L-Cysteine	2799-07-7	Protected amino acid, used for peptide synthesis and drug molecular protection.
8	L-Cystine Dimethyl Ester Dihydrochloride	32854-09-4	Pharmaceutical intermediate, used for drug synthesis and organic reaction reagents.
9	S-tert-Butyl-L-Cysteine Hydrochloride	2481-09-6	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
10	S-Acetyl-L-Cysteine	15312-11-5	Pharmaceutical raw material and cosmetic raw material, used for liver protection drugs and skin care product antioxidant formulations.
11	Selenocystamine Dihydrochloride	3542-13-0	Biological reagent and pharmaceutical intermediate, used for antitumor drug research and development and biochemical detection reagents.
12	L-Homocysteine	6027-13-0	Biological reagent and pharmaceutical intermediate, used for cardiovascular drug research and development and biochemical research.
13	D-Homocysteine	6027-14-1	Chiral biological reagent, used for optically pure drug synthesis and biochemical research.
14	D-Cysteine Ethyl Ester Hydrochloride	75521-14-1	Chiral pharmaceutical intermediate, used for peptide synthesis and drug molecular modification.
15	Carboxymethoxylamine Hemihydrochloride	2921-14-4	Organic synthesis reagent, used for drug molecular modification and oximation reaction reagents.
16	D-Homocystine	6027-15-2	Chiral organic intermediate, used for optically pure drug synthesis and bioactive molecule research and development.
17	N-Acetyl-DL-Homocysteine Thiolactone	1195-16-0	Pharmaceutical intermediate, used for antibiotic synthesis and drug molecular modification.
18	Cystamine Sulfate	16214-16-7	Chemical raw material and pharmaceutical intermediate, used for polymer material synthesis and drug research and development.
19	N,N'-Diacetyl-L-Cystine	5545-17-5	Protected amino acid, used for peptide synthesis and drug molecular protection.
20	Cystamine Dihydrochloride	56-17-7	Pharmaceutical intermediate and chemical raw material, used for drug synthesis and water treatment agents.
21	Bucillamine	65002-17-7	Pharmaceutical raw material, used for rheumatoid arthritis treatment drugs.
22	DL-Cysteine Hydrochloride	10318-18-0	Organic synthesis intermediate, used for general drug synthesis and fine chemical production.
23	DL-Homocysteine Thiolactone Hydrochloride	6038-19-3	Pharmaceutical intermediate, used for drug synthesis and organic reaction reagents.
24	S-Ethylhomocysteine	67-21-0	Biological reagent and pharmaceutical intermediate, used for antitumor drug research and development and biochemical research.
25	Citiolone	17896-21-8	Pharmaceutical raw material, used for expectorant drugs and liver protection drugs.
26	N-Chloroacetyl-DL-Homocysteine Thiolactone	84611-22-3	Pharmaceutical intermediate, used for antibiotic synthesis and drug molecular modification.
27	DL-Cysteine Base	3374-22-9	Organic synthesis intermediate, used for drug synthesis and fine chemical production.
28	N-Carbamoyl-L-Cysteine	24583-23-1	Pharmaceutical intermediate and health product raw material, used for drug synthesis and nutritional supplements.
29	S-Carboxymethylcysteine	638-23-3	Pharmaceutical raw material and food additive, used for expectorant drugs and food antioxidants.
30	Erdosteine	84611-23-4	Pharmaceutical raw material, used for chronic obstructive pulmonary disease treatment drugs and expectorant drugs.
31	L-Cysteic Acid Monohydrate	23537-25-9	Biological reagent and pharmaceutical intermediate, used for biochemical detection and drug research and development.
32	N-Acetyl-D-Cysteine	26117-28-2	Chiral pharmaceutical raw material, used for optically pure drug synthesis and antioxidant reagents.
33	D-Homocysteine	454-28-4	Chiral biological reagent, used for biochemical research and optically pure drug synthesis.
34	N-Acetylcysteine Methyl Ester	32381-28-5	Pharmaceutical intermediate, used for drug molecular modification and organic synthesis reactions.
35	S-Acetamidomethyl-L-Cysteine Hydrochloride	28798-28-9	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
36	DL-Homocysteine	454-29-5	Biological reagent and pharmaceutical intermediate, used for biochemical research and drug synthesis.
37	D-Ethylhomocysteine	535-32-0	Chiral organic intermediate, used for optically pure drug synthesis and bioactive molecule research and development.
38	DL-Cystine	923-32-0	Feed additive and food nutrition fortifier, used for animal nutrition supplementation and human essential amino acid supplementation.
39	Cystathionine	535-34-2	Biological reagent and pharmaceutical intermediate, used for biochemical research and drug research and development.
40	Homocysteine S-Ethyl Ether	13073-35-3	Biological reagent and pharmaceutical intermediate, used for antitumor drug research and development and biochemical detection.
41	L-Cys(aminoethyl)-OH·HCl	4099-35-8	Pharmaceutical intermediate, used for drug molecular modification and biological coupling reactions.
42	(H-D-Cys-OMe)₂·2HCl	144000-36-2	Chiral pharmaceutical intermediate, used for optically pure drug synthesis and peptide synthesis.
43	S,N-Diacetyl-L-Cysteine	18725-37-6	Protected amino acid, used for peptide synthesis and drug molecular protection.
44	L-Cystine Dihydrochloride	90350-38-2	Organic synthesis intermediate, used for drug synthesis and fine chemical production.
45	3,3-Dimethyl-DL-Cysteine	1113-41-3	Pharmaceutical raw material, used for rheumatoid arthritis treatment drugs and heavy metal antidotes.
46	D-Cystine	49-46-2	Chiral organic intermediate, used for optically pure drug synthesis and bioactive molecule research and development.
47	N-Acetyl-L-Cysteine Methyl Ester	7652-46-2	Pharmaceutical intermediate, used for drug synthesis and organic reaction reagents.
48	H-D-Cys-OH·HCl·H₂O	207121-46-8	Chiral pharmaceutical raw material, used for optically pure drug synthesis and biochemical reagents.
49	S-tert-butylthio-L-Cysteine	30044-51-0	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
50	H-DL-Cys-OH·HCl Monohydrate	116797-51-4	Pharmaceutical raw material and food additive, used for drug synthesis and food nutrition fortifiers.
51	N-Acetyl-DL-Penicillamine	59-53-0	Pharmaceutical raw material and cosmetic raw material, used for heavy metal antidotes and skin care product antioxidant formulations.
52	(R)-S-Benzylcysteine	23032-53-3	Chiral protected amino acid, used for optically pure drug synthesis and peptide synthesis.
53	Adenosylhomocysteinase	9025-54-1	Bioenzyme preparation, used for biochemical reaction catalysis and biopharmaceutical processes.
54	L-Cysteamine Hydrochloride	156-57-0	Pharmaceutical intermediate and cosmetic raw material, used for drug synthesis and skin care product anti-aging formulations.
55	N-Acetyl-L-Cysteinamide	38520-57-9	Pharmaceutical intermediate, used for drug synthesis and bioactive molecule research and development.
56	S-Carboxymethyl-L-Cysteine	186537-58-6	Pharmaceutical raw material and food additive, used for expectorant drugs and food antioxidants.
57	H-Cys-OEt·HCl	868-59-7	Pharmaceutical intermediate, used for peptide synthesis and drug molecular modification.
58	L-Cystine Hydrochloride	34760-60-6	Organic synthesis intermediate, used for drug synthesis and fine chemical production.
59	H-D-Cys-OMe·HCl	70361-61-4	Chiral pharmaceutical intermediate, used for optically pure drug synthesis and peptide synthesis.
60	DL-Cysteine·HCl·H₂O	96998-61-7	Pharmaceutical raw material and food additive, used for drug synthesis and food nutrition fortifiers.
61	S-Phenyl-L-Cysteine	34317-61-8	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
62	Oxothiazolidinecarboxylic acid	19771-63-2	Pharmaceutical raw material and cosmetic raw material, used for antioxidant drugs and skin care product anti-aging formulations.
63	H-Cys-OMe·HCl	18598-63-5	Pharmaceutical intermediate, used for peptide synthesis and drug molecular modification.
64	L-(-)-Cystine Dihydrochloride	13059-63-7	Organic synthesis intermediate, used for drug synthesis and fine chemical production.
65	L-Cysteinesulfinic acid	1115-65-7	Biological reagent and pharmaceutical intermediate, used for biochemical detection and drug research and development.
66	H-D-Cys(tBu)-OH·HCl	200353-65-7	Chiral protected amino acid, used for optically pure drug synthesis and peptide synthesis.
67	H-L-Cys(Bzl)-OEt·HCl	52844-67-4	Pharmaceutical intermediate, used for peptide synthesis and drug molecular modification.
68	3,3-Dimethyl-D-Cysteine	56-67-5	Pharmaceutical raw material, used for rheumatoid arthritis treatment drugs and heavy metal antidotes.
69	N-Ac-DL-Cys(Ph)-OH	20640-68-0	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
70	Lysine Carboxymethyl Cysteinate	79458-68-7	Food additive and health product raw material, used for nutrition fortifiers and antioxidants.
71	L-Homocysteine Thiolactone Hydrochloride	31828-68-9	Pharmaceutical intermediate, used for drug synthesis and organic reaction reagents.
72	(H-Cys-βNA)₂	1259-69-4	Biochemical detection reagent, used for protease activity determination and in vitro diagnostic raw materials.
73	N-Acetyl-D-Penicillamine	15537-71-0	Chiral pharmaceutical raw material, used for optically pure drug synthesis and heavy metal antidotes.
74	L-Cystine Bisallyl Ester Bis(Toluene-4-Sulfonate)	142601-71-6	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
75	N-Acetyl-S-benzyl-DL-Cysteine	19538-71-7	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
76	L-Homocystine	626-72-2	Biological reagent and pharmaceutical intermediate, used for biochemical research and drug research and development.
77	N-Alloc-S-Trityl-L-Cysteine	96865-72-4	Protected amino acid, used for peptide synthesis and drug molecular protection.
78	S-(carboxymethyl)-D-Cysteine	50698-76-5	Chiral pharmaceutical raw material, used for optically pure drug synthesis and expectorant drugs.
79	S-Allyl-L-Cysteine	21593-77-1	Health product raw material and food additive, used for antioxidant nutritional supplementation and food flavor enhancers.
80	S-Benzyl-N-Acetyl-L-Cysteine	19542-77-9	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
81	L-Cystinebis(t-butyl ester)dihydrochloride	38261-78-8	Protected amino acid, used for peptide synthesis and drug molecular protection.
82	H-Cys(Dpm)-OH	5191-80-0	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
83	H-Cys(Bzl)-OMe·HCl	16741-80-3	Pharmaceutical intermediate, used for peptide synthesis and drug molecular modification.
84	DL-Cysteinate Methyl Hydrochloride	5714-80-7	Organic synthesis intermediate, used for general drug synthesis and fine chemical production.
85	Lysine-S-Carboxymethyl-L-Cysteine	49673-81-6	Health product raw material and food additive, used for nutrition fortifiers and antioxidants.
86	S-Trityl-D-Cysteine	25840-82-8	Chiral protected amino acid, used for optically pure drug synthesis and peptide synthesis.
87	S-Methyl-L-Cysteine	1187-84-4	Food additive and health product raw material, used for food flavor enhancers and nutritional supplements.
88	S-Allyl-L-Cysteine Hydrochloride	60114-85-4	Pharmaceutical intermediate and health product raw material, used for drug synthesis and antioxidant nutritional supplementation.
89	H-Cys(Trt)-NH₂	166737-85-5	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
90	S-Methyl-L-Cysteine Sulphoxide	6853-87-8	Food additive and biological reagent, used for food flavor enhancers and biochemical detection.
91	N-Ac-Cys(Trt)-OH	27486-87-9	Protected amino acid, used for peptide synthesis and drug molecular protection.
92	L-Selenocystine	29621-88-3	Health product raw material and feed additive, used for selenium supplementation and antioxidant nutrition enhancement.
93	N,S-Diacetyl-L-Cysteine Methyl Ester	19547-88-7	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
94	L-Cysteine Hydrochloride Anhydrous	52-89-1	Pharmaceutical raw material and food additive, used for drug synthesis and food antioxidants.
95	L-Cystine	56-89-3	Feed additive and food nutrition fortifier, used for animal nutrition supplementation and human essential amino acid supplementation.
96	S,N-Diacetylcysteine Monoethyl Ester	19547-89-8	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
97	3-(Methylseleno)-L-Alanine	26046-90-2	Health product raw material and feed additive, used for selenium supplementation and antioxidant immune regulation.
98	L-Cysteine Base	52-90-4	Pharmaceutical raw material and organic synthesis intermediate, used for drug synthesis and fine chemical production.
99	N-Acetyl-L-Cysteine	616-91-1	Pharmaceutical raw material and cosmetic raw material, used for expectorant drugs and skin care product antioxidant formulations.
100	S-Adenosyl-L-Homocysteine	979-92-0	Biological reagent and pharmaceutical intermediate, used for biochemical research and antiviral drug research and development.
101	DL-Homocystine	870-93-9	Biological reagent and pharmaceutical intermediate, used for biochemical research and drug synthesis.
102	S-Allylcysteine	770742-93-3	Chiral health product raw material, used for optically pure drug synthesis and antioxidant nutritional supplementation.
103	3,3-Dimethyl-DL-Cysteine H₂O	50967-93-6	Pharmaceutical raw material, used for rheumatoid arthritis treatment drugs and heavy metal antidotes.
104	H-D-Cys-OH·H₂O·HCl	32443-99-5	Chiral pharmaceutical raw material, used for optically pure drug synthesis and biochemical reagents.
105	L-Cysteine Sulfinate Sodium	207300-87-8	Food additive and cosmetic raw material, used for food antioxidants and skin care product whitening formulations.
106	DL-Cysteinesulfinic Acid	454-42-2	Biological reagent and pharmaceutical intermediate, used for biochemical detection and drug research and development.
107	S-Isopropyl-L-Cysteine	18598-64-6	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
108	D-Cysteine Sulfinate Sodium	137205-03-3	Chiral food additive, used for optically pure drug synthesis and food antioxidants.
109	N-Propionyl-L-Cysteine	14246-08-1	Pharmaceutical intermediate and cosmetic raw material, used for drug molecular modification and skin care product antioxidant formulations.
110	L-Homocysteine Thiolactone	31828-67-8	Pharmaceutical intermediate, used for drug synthesis and organic reaction reagents.

(2) CBZ-Cystine and Cysteine Derivatives

No.	Product Name	CAS No.	Category & Application
111	(Cbz-L-Cys-OH)₂	6968-11-2	Protected amino acid, used for peptide synthesis and drug molecular protection.
112	CBZ-Cys(Bzl)-OH	3257-18-9	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
113	CBZ-Cys(Z)-OH	57912-35-3	Protected amino acid, used for peptide synthesis and drug molecular double protection.
114	CBZ-S-Phenyl-L-Cysteine	159453-24-4	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
115	CBZ-Cys(Bzl)-ONp	3401-37-4	Organic synthesis coupling reagent, used for drug molecular coupling reactions.
116	CBZ-S-Phenyl-D-Cysteine	82611-65-2	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
117	H-Cys(Z)-OH	1625-72-5	Core protected amino acid, used for peptide synthesis and drug molecular protection.
118	CBZ-D-Cysteine	149270-13-3	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
119	CBZ-L-Cys-OMe	56762-94-8	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
120	CBZ-D-Cysteine Methyl Ester	126124-76-9	Chiral protected amino acid intermediate, used for optically pure drug synthesis.

(3) BOC-Cystine and Cysteine Derivatives

No.	Product Name	CAS No.	Category & Application
121	Boc-Cys(Acm)-OH	138775-00-5	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
122	Boc-Cys(tBu)-OH	56976-06-8	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
123	Boc-D-Cysteine	149270-12-2	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
124	Boc-S-Trityl-D-Cysteine	87494-13-1	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
125	Boc-Pen(Trt)-OH	135592-13-1	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
126	Boc-D-Pen(Trt)-OH	135592-14-2	Chiral protected amino acid intermediate, used for optically pure drug synthesis.
127	Boc-D-Pen(Acm)-OH	201421-14-9	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
128	Boc-D-Hocys(Trt)-OH	201419-16-1	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
129	Boc-Cys(Bzl)-OH	5068-28-0	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
130	Boc-Cys(NPys)-OH	76880-29-0	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
131	Boc-Cys(Trt)-OSu	75179-29-2	Organic synthesis coupling reagent, used for drug molecular coupling reactions.
132	Boc-Cys(Bzl)-OSu	3401-33-0	Organic synthesis coupling reagent, used for drug molecular coupling reactions.
133	Boc-Cys(pMeOBzl)-OH	58290-35-0	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
134	Boc-Cys(fm)-OH	84888-35-7	Protected amino acid, used for peptide synthesis and drug molecular double protection.
135	Boc-D-Pen(PMeBzl)-OH	198470-36-9	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
136	BOC-CYS(ACM)-OH	19746-37-3	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
137	Boc-Pen(Acm)-OH	129972-45-8	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
138	BOC-L-Cysteinate Methyl	55757-46-5	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
139	Boc-Cys(pMeOBzl)-OH	18942-46-6	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
140	Boc-Cys(Bzl)-OH	102830-49-9	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
141	Boc-Cys(StBu)-OH	30044-61-2	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
142	(Boc-Cys-OH)₂	10389-65-8	Protected amino acid, used for peptide synthesis and drug molecular protection.
143	Boc-D-Pen(MOB)-OH	120944-75-4	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
144	Boc-Cys(acm)-ONP	58651-76-6	Organic synthesis coupling reagent, used for drug molecular coupling reactions.
145	Boc-Cys(pMeBzl)-OH	61925-77-7	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
146	Boc-Cys(Acm)-OH	61925-78-8	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
147	BOC-CYS(ME)-OH	16947-80-1	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
148	Boc-L-Cysteine	20887-95-0	Core protected amino acid, used for peptide synthesis and drug molecular protection.
149	Boc-S-Benzyl-L-Cysteinol	139428-96-9	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
150	Boc-Cys(Dpm)-OH	21947-97-7	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
151	Boc-Cys(Trt)-OH	21947-98-8	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
152	BOC-HOCYS(BZL)-OH	16947-99-2	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
153	Boc-D-Cys(tBu)-OH·HCl	200353-66-8	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
154	Boc-L-Cys-OtBu	13734-32-5	Protected amino acid, used for peptide synthesis and drug molecular protection with strong stability.

(4) FMOC-Cystine and Cysteine Derivatives

No.	Product Name	CAS No.	Category & Application
155	Fmoc-Cys(Trt)-NH₂	202752-01-0	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
156	Fmoc-Pen(Trt)-OH	201532-01-6	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
157	(Fmoc-Cys-OH)₂	135273-01-7	Protected amino acid, used for peptide synthesis and drug molecular protection.
158	Fmoc-D-Cys(Trt)-OH	167015-11-4	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
159	Fmoc-Cys(tBu)-OH	67436-13-9	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
160	FMOC-D-CYS(BZL)-OH	252049-18-6	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
161	Fmoc-Cys(Trt)-OPfp	115520-21-3	Organic synthesis coupling reagent, used for drug molecular coupling reactions.
162	Fmoc-Cys(MMt)-OH	177582-21-7	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
163	Fmoc-D-Cys(TBU)-OH	131766-22-8	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
164	Fmoc-HomoCys(Trt)-OH	167015-23-8	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
165	Fmoc-D-Cys(Mtt)-OH	252206-29-4	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
166	Fmoc-Cys(Dpm)-OH	247595-29-5	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
167	Fmoc-Cys(Trt)-OH	103213-32-7	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
168	Fmoc-Cys(Bzl)-OH	53298-33-2	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
169	Fmoc-Cys(Et)-OH	200354-34-3	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
170	Fmoc-Cys(2-Hydroxyethyl)-OH	200354-35-4	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
171	BOC-CYS(FM)-OH	84888-35-7	Protected amino acid, used for peptide synthesis and drug molecular double protection.
172	Fmoc-L-Cys-OtBu	139592-37-3	Protected amino acid, used for peptide synthesis and drug molecular protection.
173	H-Cys(Fm)-OH	84888-38-0	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
174	Fmoc-Cys(pMeOBzl)-OH	141892-41-3	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
175	FMOC-CYS(STBU)-OH	73724-43-3	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
176	Fmoc-N-Me-Cys(Trt)-OH	944797-51-7	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
177	Fmoc-Cys(pMeBzl)-OH	136050-67-4	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
178	Fmoc-Cys(STmp)-OH	1403834-74-1	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
179	Fmoc-Pen(AcM)-OH	201531-76-2	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
180	Alloc-Cys(Fm)-OH	182201-77-0	Protected amino acid, used for peptide synthesis and drug molecular double protection.
181	FMOC-D-PEN(ACM)-OH	201531-77-3	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
182	Fmoc-D-Cys-OH·H₂O	157355-80-1	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
183	Fmoc-Cys(Acm)-OH	86060-81-3	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
184	Fmoc-Cys(Me)-OH	138021-87-1	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
185	Fmoc-Pen(Trt)-OH	201531-88-6	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.
186	Fmoc-D-Cys(Acm)-OH	168300-88-7	Chiral protected amino acid, used for optically pure drug synthesis and peptide modification.
187	Fmoc-L-Cysteine	135248-89-4	Core protected amino acid, used for peptide synthesis and drug molecular protection.
188	Fmoc-Cys(Acm)-OPfp	86060-96-0	Organic synthesis coupling reagent, used for drug molecular coupling reactions.
189	Fmoc-D-Cysteine Methyl Ester Hydrochloride	126124-77-0	Chiral protected amino acid intermediate, used for optically pure drug synthesis.
190	Fmoc-L-Cysteine Ethyl Ester	135248-90-7	Protected amino acid intermediate, used for peptide synthesis and drug molecular modification.

Cystine and Cysteine Series

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