Chemical Name: (3R,5R)-7-[5-(4-Fluorophenyl)-3-isopropyl-2-oxo-4-phenyl-3-(phenylcarbamoyl)-2,3-dihydro-1H-pyrrol-1-yl]-3,5-dihydroxyheptanoic acid Sodium salt (as per USP)
Synonym: Atorvastatin Lactam Impurity ; Atorvastatin Oxo Impurity ; Atorvastatin EP impurity Q(SODIUM SALT)