1-[2-[(2S)-3,6-Dihydro-6-oxo-2H-pyran-2-yl]-ethyl]-5-(4-fluorophenyl)-2-(1-methylethyl)-N,4-diphenyl-1Hpyrrole-3-carboxamide ; Anhydro Atorvastatin Lactone ; 2,3-Anhydro Atorvastatin Lactone ; 3-Dehydroxy 2,3-Dehydro Atorvastatin Lactone ; Atorvastatin Eliminated Lactone