Compounds or pharmacologically acceptable salts thereof for promoting osteogenesis, improving bone metabolism, preventing or treating bone fracture, preventing or treating a disease associated with bone metabolism, or in the field of orthopedics for the promotion of healing of bone fracture, a bone defect, and bone diseases such as osteoarthritis as well as in the field of dentistry for the treatment of periodontal disease and the stabilization of artificial tooth root. The compounds are represented by formula (I) or a pharmacologically acceptable salt thereof:
