Atorvastatin EP Impurity C (Sodium) Catalogue A325303 CAS 693793-53-2 M.W 598.61 M.F C33H33F2N2NaO5 Specifications FAQs (3R,5R)-7-[3-(Phenylcarbamoyl)-4,5-bis(4-fluorophenyl)-2-isopropyl-1H-pyrrol-1-yl]-3,5-dihydroxyheptanoic acid sodium salt