PPARγ-IN-3 (compound 9ga) is a potent and orally active PPARγ inhibitor. PPARγ-IN-3 reduces triglyceride (TG) accumulation with low cytotoxicity. PPARγ-IN-3 preventes the excessive growth of body weight and lessened fat mass as well as liver mass, decreases lipid accumulation in the liver and blood. PPARγ-IN-3 has the potential for the research of diet-induced obesity.