3PO is a PFKFB3 (6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase) inhibitor. 3PO reduces glycolytic flux and suppresses glucose uptake. 3PO may be useful agents in combination with other drugs that inhibit cancer cell proliferation. PFKFB3 inhibitors suppress glucose uptake, which in turn causes an increase in autophagy. The addition of selective inhibitors of autophagy to 3PO and its more potent derivatives may prove useful as rational combinations for the treatment of cancer.