Rosuvastatin Acid Impurity - C (Freebase)

5-Oxo Rosuvastatin; (3R,6E)-7-[4-(4-Fluorophenyl)-2-[methyl(methylsulfonyl)amino]-6-(propan-2-yl)pyrimidin-5-yl]- 3-hydroxy-5-oxohept-6-enoic Acid; 3-Hydroxy-5-keto Rosuvastatin;(3R,6E)-7-[4-(4-Fluorophenyl)-6-(1-methylethyl)-2-[methyl(methylsulfonyl)amino]-5-pyrimidinyl]-3-hydroxy-5-oxo-6-heptenoic Acid; (R,E)-7-(4-(4-fluorophenyl)-6-isopropyl-2-(N-methylmethylsulfonamido)pyrimidin-5-yl)-3-hydroxy-5-oxohept-6-enoic acid; Rosuvastatin Ketone; (USP);