Lopinavir EP Impurity A

Chemical Name: (2S)-N-[(1S,3S,4S)-1-Benzyl-4-amino-3-hydroxy-5-phenylpentyl]-3-methyl-2-[2-oxotetrahydropyrimidin1(2H)-yl]butanamide (as per EP); (S)-N-[(2S,4S,5S)-5-Amino-4-hydroxy-1,6-diphenylhexan-2-yl]-3-methyl-2-[2-oxotetrahydropyrimidin-1(2H)-yl]butanamide (as per USP)