Atorvastatin Epoxy Tetrahydrofuran Analog (USP)

Chemical Name:  4-(4-Fluorophenyl)-2,4-dihydroxy-2-isopropyl-N,5-diphenyl-3,6-dioxabicyclo [3.1.0]hexane-1-carboxamide (as per USP) ; (1E,2E,4E,5E)-4-(4-fluorophenyl)-2,4-dihydroxy-N,5-diphenyl-2-(propan-2-yl)-3,6-dioxabicyclo[3.1.0]hexane-1-carboxamide

Synonym:  Atorvastatin Dihydroxy Epoxy Impurity

Smile: FC(C=C1)=CC=C1C(OC(C(C)C)(O)C2(C(NC3=CC=CC=C3)=O)O4)(O)C24C5=CC=CC=C5