An object of the present invention is to provide a novel low molecular weight compound exhibiting an osteogenesis-promoting action. This object is achieved by a compound having the general formula (I) or a pharmacologically acceptable salt thereof. In the general formula (I), R1 and R2 represent hydrogen atoms, and the like； R3 represents a hydrogen atom, and the like； X, Y, and Z represent nitrogen atoms, and the like； A represents a phenylene group, and the like； n represents 1 or 2, and the like； and V and W represent oxygen atoms, and the like.
