Glucopiericidin A is a natural piericidin compound obtained from a marine-derived Streptomyces strain. Glucopiericidin A serves as a glucose transporter (GLUT) chemical probe and suppresses glycolysis. Glucopiericidin A inhibits ATP-dependent filopodia protrusion with Piericidin A (PA; HY-114936) and has no effect alone. Glucopiericidin A induces cell apoptosis through reducing the reactive oxygen species (ROS) level by increasing PRDX1 and exhibits potent antitumor efficacy in ACHN mice xenografts.