Pemetrexed EP Impurity A Sodium Salt

Chemical Name: (2S)-2-[4-[2-(2-Amino-1-methyl-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzamido]pentanedioic acid Sodium salt (as per EP); {4-[2-(2-Amino-1-methyl-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl}-l-glutamic acid Sodium salt (as per USP)

Synonym: (17β)-Estra-1,3,5(10),9(11)-tetraene-3,17-diol-d3