Atorvastatin Pyrrolidone Lactone

5-(4-Fluorophenyl)-1-{2-[(2R,4R)-4-hydroxy-6-oxotetrahydro-2H-pyran-2-yl]ethyl}-3-isopropyl-2-oxo-N,4-diphenyl-2,3-dihydro-1H-pyrrole-3-carboxamide; Atorvastatin Lactam Lactone; 5-(4-Fluorophenyl)-2,3-dihydro-3-(1-methylethyl)-2-oxo-N,4-diphenyl-1-[2-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl]ethyl]-1H-pyrrole-3-carboxamide