Pemetrexed EP Impurity D

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

Synonym: Benzene-1,4-diol (hydroquinone)