A derivative of 6-mercaptopurine; active against S. faecalis when used at 0.05 to 15 mg/ml; inhibits autophagy and cholesterol synthesis in isolated and washed rat hepatocytes at 0.5, 1, or 1.5 mM; decreases tumor growth in mice bearing 6-mercaptopurine susceptible adenocarcinoma 755 tumors at 17, 35, or 70 mg/kg per day