Each vial of lyophilized powd for infusion contains pemetrexed disodium heptahydrate equivalent to pemetrexed 100 or 500 mg.
It has the chemical name disodium (2S)-2-[(4-[2-(2-amino-4-oxo-4,7-dihydro-lh-pyrrolo [2,3-d] pyrimidin-5-yl) ethyl] benzoyl] amino] pentanedioate heptahydrate.
It also has a molecular formula of C20H19N5Na2O6·7H2O and a molecular weight of 597.5.