CAS: 59-05-2 Molecular Formula: C20H22N8O5 Molecular Weight (g/mol): 454.447 InChI Key: FBOZXECLQNJBKD-ZDUSSCGKSA-N Synonym: methotrexate,abitrexate,rheumatrex,amethopterin,mexate,metatrexan,hdmtx,trexall,methylaminopterinum,antifolan PubChem CID: 126941 ChEBI: CHEBI:44185 IUPAC Name: (2S)-2-[[4-[(2,4-diaminopteridin-6-yl)methyl-methylamino]benzoyl]amino]pentanedioic acid SMILES: CN(CC1=CN=C2C(=N1)C(=NC(=N2)N)N)C3=CC=C(C=C3)C(=O)NC(CCC(=O)O)C(=O)O