KR-32570 (5-(2-Methoxy-5-chlorophenyl )furan-2-ylcarbonyl)guanidine) is a new cardioprotective agent for preventing ischemia-reperfusion injury. Human liver microsomal incubation of KR-32570 in the presence of NADPH resulted in the formation of two metabolites, hydroxy-KR-32570 and O-desmethyl-KR-32570. In this study, a kinetic analysis of the metabolism of two metabolites from KR-32570 was performed in human liver microsomes, and recombinant CYP1A2, and CYP3A4. The metabolism for hydroxy- and O-desmethyl-KR-32570 formation from KR-32570 by human liver microsomes was best described by a Michaelis-Menten equation and a Hill equation, respectively. The Cl$_{int}$ values of hydroxy- and O-desmethyl-KR-32570 formation were similar to each other (0.03 vs 0.04 ${mu}$L/min/pmol CYP, respectively). CYP3A4 mediated the formation of hydroxy-KR-32570 from KR-32570 with Cl$_{int}$ = 0.24 ${mu}$L/min/pmol CYP3A4. The intrinsic clearance for O-desmethyl-KR-32570 formation by CYP1A2 was 0.83${mu}$L/min/pmol CYP1A2. These findings suggest that CYP3A4 and CYP1A2 enzymes are major enzymes contributing to the metabolism of KR-32570.