Atorvastatin EP Impurity E 

Chemical Name: (3S,5S)-7-[2-(4-fluorophenyl)-3-phenyl-4-(phenylcarbamoyl)-5-(propan-2-yl)-1H-pyrrol-1-yl]-3,5-dihydroxyheptanoic acid (as per EP); (3S,5S)-7-[2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl]-3,5-dihydroxyheptanoic acid (as per USP)

Synonym: Ent-Atorvastatin (EP) ; Atorvastatin USP Related Compound E ; Atorvastatin (3S,5S)-enantiomer

Smile: O=C(NC1=CC=CC=C1)C2=C(N(C(C3=CC=C(C=C3)F)=C2C4=CC=CC=C4)CC[C@](O)(C[C@@](CC(O)=O)(O)[H])[H])C(C)C