CAS: 56-04-2 Molecular Formula: C5H6N2OS Molecular Weight (g/mol): 142.18 MDL Number: MFCD00006040 InChI Key: HWGBHCRJGXAGEU-UHFFFAOYSA-N Synonym: methylthiouracil,6-methyl-2-thiouracil,methiocil,4-hydroxy-2-mercapto-6-methylpyrimidine,thimecil,thiomecil,thiothymin,alkiron,metacil,2-mercapto-6-methylpyrimidin-4-ol PubChem CID: 667493 ChEBI: CHEBI:82346 IUPAC Name: 6-methyl-2-sulfanylidene-1H-pyrimidin-4-one SMILES: CC1=CC(=O)NC(=S)N1