CAS: 92083-03-9

Impurity Simvastatin Impurity K Applications 4α,5-Dihydro Simvastatin is an impurity in the synthesis of Simvastatin (S485000), a synthetic derivative of a fermentation product of Aspergillus terreus. A competitive inhibitor of HMG-CoA reductase. A synthetic analog of Lovastatin. Antilipemic. Simvastatin, the drug, is sold under the trade name Zocor. References Hoffman, W.F., et al.: J. Med. Chem., 29, 849 (1986), Mol, M.J., et al.: Lancet, 2, 936 (1986),

Dihydro-Simvastatin is a synthetic medicine that inhibits the synthesis of cholesterol by competitively inhibiting the enzyme HMG-CoA reductase. The synthesis process involves the reaction of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) with acetoacetyl CoA to form 3-hydroxy-3-methylglutaryl coenzyme A (HMG) and acetoacetate. The hydroxyl group on the HMG molecule is then oxidized to a ketone to produce dihydro simvastatin. Impurities in this product are due to side reactions involving hydroxyl groups and lactones.