PF-05175157 is broad spectrum acetyl-CoA carboxylase (ACC) inhibitor with IC50s of 27.0±2.7, 33.0±4.1, 23.5±1.1 and 50.4±2.6 nM for ACC1 (human), ACC2 (human), ACC1 (rat) and ACC2 (rat), respectively. The in vitro metabolism of PF-05175157 (Compound 9) is evaluated in microsomes from rat, dog, and human hepatocytes. PF-05175157 is not metabolized in rat, dog, or human microsomes. PF-05175157 is also stable in human hepatocyte incubations, but is minimally metabolized by recombinant human CYP3A4 and CYP3A5. PF-05175157 inhibits formation of malonyl-CoA in a concentration-dependent manner with a potency (EC50=30 nM) in rat hepatocytes consistent with its potency against rat ACC1 (24 nM).