GLUT inhibitor (Ki(app) values are 0.2, 10 and 10 μM for GLUT4, GLUT1 and GLUT3, respectively). Competitive inhibitor of net glucose uptake but a noncompetitive inhibitor of sugar efflux from cells. Inhibits passive sugar transport in human erythrocytes and cancer cell lines. Attenuates erythrocyte 3-O-metylglucose (3MG) uptake in vitro (Ki = 6 μM). Suppresses tumor growth in a nude mouse model. Purity 98%. MW (observed): 368.31