Pemetrexed EP Impurity A (N-Methyl Pemetrexed)

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 (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 (as per USP)

Synonym: N-Methyl Pemetrexed (USP)