Lopinavir Impurity 20

(αS)-3-[2-(2,6-DiMethylphenoxy)acetyl]-N-[(1S,3S,4S)-4-[[2-(2,6-diMethylphenoxy)acetyl]aMino]-3-hydroxy-5-phenyl-1-(phenylMethyl)pentyl]tetrahydro-α-(1-Methylethyl)-2-oxo-1(2H)-pyriMidineacetaMide (S)-N-[(2S,4S,5S)-5-Amino-4-hydroxy-1,6-diphenylhexan-2-yl]-3-methyl-2-(2-oxotetrahydropyrimidin-1(2H)-yl)butanamide Lopinavir EP impurity Q (2,6-Xylyloxy)acetyl Lopinavir N-[(1S,2S,4S)-4-amino-2-hydroxy-5-phenyl-1-(phenylmethyl)pentyl]-2-(2,6-dimethylphenoxy)acetamide

Lopinavir Impurity 15 Lopinavir Impurity 10 Lopinavir Impurity 6 Lopinavir Impurity 7 Lopinavir Impurity 3

Lopinavir Impurity 14 Lopinavir Impurity 9 Lopinavir Impurity 12 Lopinavir Impurity 4 Lopinavir Impurity 13

Lopinavir Impurity 8 Lopinavir Impurity 2 Lopinavir Impurity 16