enzyme inhibitor atorvastatin (3R,5R)-7-[3-(anilinocarbonyl)-5-(4-fluorophenyl)-4-phenyl-2-(propan-2-yl)-1H-pyrrol-1-yl]-3,5-dihydroxyheptanoic acid 2019-07-24T15:29:21Z Atorvastatin (Lipitor) is a member of the drug class known as statins. It is used for lowering cholesterol. Atorvastatin is a competitive inhibitor of hydroxymethylglutaryl-coenzyme A (HMG-CoA) reductase, the rate-determining enzyme in cholesterol biosynthesis via the mevalonate pathway. HMG-CoA reductase catalyzes the conversion of HMG-CoA to mevalonate. Atorvastatin acts primarily in the liver. Decreased hepatic cholesterol levels increases hepatic uptake of cholesterol and reduces plasma cholesterol levels. CHEBI:39548 Lipitor XCO:0000628 experimental_condition_ontology sjwang antilipemic agent