Lopinavir EP Impurity F 

Chemical Name:  N-[(1S,2S,4S)-1-Benzyl-4-(formylamino)-2-hydroxy-5-phenylpentyl]-2-(2,6-dimethylphenoxy)acetamide (as per EP); 2-(2,6-Dimethylphenoxy)-N-[(2S,3S,5S)-5-formamido-3-hydroxy-1,6-diphenylhexan-2-yl]acetamide (as per USP)

Synonym: Lopinavir N-Formylphenoxyacetamide (USP)

Smile: O=C(COC1=C(C)C=CC=C1C)N[C@](CC2=CC=CC=C2)([H])[C@]([H])(C[C@](NC=O)([H])CC3=CC=CC=C3)O