... 2,3-d]pyrimidin-5-yl)ethyl]benzoyl]-L- glutamic acid diethyl esterOther Name: 11-Cyclopropyl-5,11-dihydro-4-methyl-6H-dipyrido[2 ... ,3-b:3',2'-e][1,4]diazepin-6-oneFormula:C24 ... pemetrexed intermeidate (S)-Diethyl 2-(4-(2-(2-amino-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzamido)pentanedi