The chemical Pemetrexed disodium heptahydrate has a designated molecular formula of C20H33N5Na2O13 and a molecular weight of 597.486 g/mol. Synonyms may include: UNII9T47E4OM16 (ChemID). Pemetrexed disodium heptahydrate has been assigned a MeSH pharmacological action of: Antineoplastic, ,", ",, Folic Acid Antagonist, Nucleic Acid Synthesis Inhibitor.