Lopinavir EP Impurity B

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

Synonym: 2-chloro-10-(3-(4-methylpiperazin-1-yl-2,2,3,3,5,5,6,6-d8)propyl)-10H-phenothiazine

Smile: CC(C)[C@H](N1CCCNC1=O)C(N[C@@H](CC2=CC=CC=C2)C[C@H](O)[C@@H](NC=O)CC3=CC=CC=C3)=O