FIG. 2.
Compounds used in this study. Known metal coordinating ligands appear for each biguanide analog in gray. In pioglitazone, gray highlighting denotes the region of similarity between glitazones and metformin, along with the sulfur atom that undergoes oxidation-enabling linearization of the thiazolidinedione moiety. Chemical structures were drawn using ChemSketch (Advanced Chemistry Development, Inc.).