CAS: 56-89-3 Molecular Formula: C6H12N2O4S2 Molecular Weight (g/mol): 240.292 MDL Number: MFCD00064228 InChI Key: LEVWYRKDKASIDU-IMJSIDKUSA-N Synonym: l-cystine,cystine,l-dicysteine,l-cystin,cystine acid,cysteine disulfide,oxidized l-cysteine,beta,beta'-dithiodialanine,h-cys-oh 2,l-cysteine disulfide PubChem CID: 67678 ChEBI: CHEBI:16283 IUPAC Name: (2R)-2-amino-3-[[(2R)-2-amino-2-carboxyethyl]disulfanyl]propanoic acid SMILES: C(C(C(=O)O)N)SSCC(C(=O)O)N