Abstract Eleven analogues of GW 501516 (1) were prepared and subjected to biological testing in a semi-high throughput human skeletal muscle cell assay. The assay testing indicated that all analogues elicited oxidation of oleic acid. Among the most potent agonists, 2e (2-{2-ethyl-4-[(4-methyl-2-(4-trifluoromethylphenyl) thiazol-5-yl) methylthio] phenoxy}-2- methylpropanoic acid), was also subjected to a luciferase-based transfection assay, which ...