Chemical Name: Sodium, (3R)-4-(1b-(4-Fluorophenyl)-7-hydroxy-7-isopropyl-1a-phenyl-7a-(phenylcarbamoyl)hexahydro-1aH-oxireno[2′,3′:3,4]pyrrolo[2,1-b][1,3]oxazin-3-yl)-3-hydroxybutanoate(as per USP)
Synonym: Atorvastatin Cyclic Fluorophenyl Sodium Salt Impurity ; Atorvastatin FX1 Impurity Sodium salt