Synonyms: 75607-63-5;AC1Q2HCG;AC1L4G19;AG-H-01318;L-Cysteine, S-(7-methyl-5-oxo-5H-1,3,4-thiadiazolo(3,2-a)pyrimidin-2-yl)-;S-(7-METHYL-5-OXO-5H-1,3,4-THIADIAZOLO[3,2-A]PYRIMIDIN-2-YL)-L-CYSTEINE;(2R)-2-amino-3-[(7-methyl-5-oxo-[1,3,4]thiadiazolo[3,2-a]pyrimidin-2-yl)sulfanyl]propanoic acid;(2R)-2-amino-3-[(7-methyl-5-oxo-[1,3,4]thiadiazolo[4,5-a]pyrimidin-2-yl)sulfanyl]propanoic acid