Lopinavir EP Impurity M 

Chemical Name: (2S)-N-[(1R,3R,4S)-1-Benzyl-4-[[2-(2,6-dimethylphenoxy)acetyl]amino]-3-hydroxy-5-phenylpentyl]3-methyl-2-[2-oxotetrahydropyrimidin-1(2H)-yl]butanamide (as per EP); (S)-N-{(2R,4R,5S)-5-[2-(2,6-Dimethylphenoxy)acetamido]-4-hydroxy-1,6-diphenylhexan-2-yl}-3-methyl-2-[2-oxotetrahydropyrimidin-1(2H)-yl]butanamide (as per USP)

Synonym: 1-(isopropylamino)-3-((naphthalen-1-yl-d7)oxy)propan-2-ol

Smile: CC(C)[C@H](N1CCCNC1=O)C(N[C@@H](C[C@@H](O)[C@@H](NC(COC2=C(C)C=CC=C2C)=O)CC3=CC=CC=C3)CC4=CC=CC=C4)=O