Pemetrexed disodium heptahydrate (LY231514; HSDB7316; LY-231514; HSDB-7316; Alimta), the heptahydrated disodium salt of Pemetrexed and a pyrimidine-based antifolate, is an antifolate and antimetabolite anticancer medication. It targets TS, DHFR, and GARFT with Ki values of 1.3 nM, 7.2 nM, and 65 nM, in that order. In a variety of tumor types, including malignant mesothelioma, NSCLC (non-small cell lung carcinoma), carcinomas of the breast, colorectum, uterine cervix, head and neck, and bladder, pemetrexed shows strong antitumor activity.