HMG-CoA Reductase-IN-1 is a potent small molecule inhibitor targeting HMG-CoA reductase (HMGR) with a pIC50 of 8.54 and demonstrating affinity for the OATP1B1 transporter. It serves as a valuable research tool for investigating cholesterol metabolism and potential therapeutic strategies for hypercholesterolemia in both cellular and animal models.