N-(8-Fluoro-4-isopropyl-6-(2-oxo-2H-pyran-6-yl)-5,6-dihydrobenzo[h]quinazolin-2-yl)-N-methylmethanesulfonamide is an impurity of the HMG-CoA reductase inhibitor Rosuvastatin (R700500). Molecular Formula: C22H22FN3O4S Solubility: DCM Molecular Weight: 443.49