This invention relates to an agent for inducing differentiation of white adipocytes into brown-like adipocytes comprising a compound which is a cyclization reaction product of a hydroxystilbene and which is represented by Formula (1): (wherein each of R1 to R8 is a hydrogen atom, a hydroxyl group, a saturated or unsaturated, straight or branched alkoxy group having 1 to 10 carbon atoms, or a saturated or unsaturated, straight or branched alkyl group having 1 to 10 carbon atoms, and R1 to R8 may be same or different), or a pharmaceutically acceptable salt thereof.
