Pemetrexed Disodium Heptahydrate

N-[4-[2-(2-Amino-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]-L-glutamic Acid Disodium Salt Heptahydrate;Sodium (4-(2-(2-amino-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzoyl)-L-glutamate Heptahydrate; l-Glutamic acid, N-[4-[2-(2-amino-4,7-dihydro-4-oxo-1H -pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]-, disodium salt, heptahydrate; Disodium N-{p-[2-(2-amino-4,7-dihydro-4-oxo-1H -pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl}-l-glutamate heptahydrate ;