Provided is a compound useful as an AMPK activator. A compound represented by formula (wherein R4 represents a hydrogen atom or a substituted or unsubstituted alkyl group R1, R2 and R3 independently represent a hydrogen atom, a halogen atom, a hydroxy group, a cyano group, a nitro group, a carboxy group, a substituted or unsubstituted alkyl group, or the like, wherein a case in which R1, R2 and R3 represent a hydrogen atom simultaneously is excluded X represents a single bond, -S-, -O-, -NR5-, -C(=O)-, or the like R5 represents a hydrogen atom, or a substituted or unsubstituted alkyl group and Y represents a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted cycloalkenyl group, a substituted or unsubstituted heterocyclyl group, or the like), or a pharmaceutically acceptable salt thereof.
