O-Methyl Atorvastatin Calcium Salt;(βR,δR)-2-(4-Fluorophenyl)-δ-hydroxy-β-Methoxy-5-(1-Methylethyl)-3-phenyl-4-[(phenylaMino)carbonyl]-1H-pyrrole-1-heptanoic Acid CalciuM Salt;Atorvastatin IMpurity-G(EP);Atorvastatin EP IMpurity G;Atorvastatin EP Impurity G Sodium Salt;(3R,5R)-7-[3-(Phenylcarbamoyl)-5-(4-fluorophenyl)-2-isopropyl-4-phenyl-1H-pyrrol-1-yl]-5-hydroxy-3-methoxy-heptanoic acid Calcium salt;Calcium(3R,5R)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-5-hydroxy-3-methoxyheptanoate;Atorvastatin EP Imp G