Methotrexate EP Impurity H

Chemical Name: (2S)-2-[[4-[[(2,4-diaminopteridin-6-yl)methyl]methylamino]benzoyl]amino]-5-methoxy-5-oxopentanoic acid (as per EP) ; (S)-2-(4-{[(2,4-Diaminopteridin-6-yl)methyl](methyl)amino}benzamido)-5-methoxy-5-oxopentanoic acid (as per USP)

Synonym: Methotrexate 5-Methyl Ester (EP) ; Methotrexate USP Related Compound H