仅用于工业应用或科学研究，不可用于人类或动物的临床诊断或治疗，非药用.Pemetrexed disodium heptahydrate is a novel antifolate, the Ki values of the pentaglutamate of LY231514 are 1.3, 7.2, and 65 nM for inhibits thymidylate synthase （TS）, dihydrofolate reductase （DHFR）, and glycinamide ribonucleotide formyltransferase （GARFT）, respectively.