A prophylactic or therapeutic agent for inflammatory diseases or bone diseases comprising a compound represented by the following formula (1) (in the Formula (1), X represents a hydrogen atom, a halogen atom or an optionally substituted alkyl group having 1 to 10 carbon atoms, R1 represents an optionally substituted alkyl group having 1 to 10 carbon atoms, an optionally substituted alkenyl group having 1 to 10 carbon atoms or an optionally substituted aryl group having 6 to 14 carbon atoms, and one or more of hydrogen atom may be replaced by deuterium atom.) or a pharmacologically acceptable salt thereof as an active ingredient:含有下述式(1)〔式(1)中，X係表示氫原子、鹵素原子或可被替換的碳原子數1~10的烷基；R1係表示可被替換的碳原子數1~10的烷基、可被替換的碳原子數1~10的烯基或可被替換的碳原子數6~14的芳基；1以上的氫原子也可以與重氫原子替換。〕表示的化合物或其藥理學所容許的鹽作為有效成分的發炎性疾病或骨病的預防或治療劑，及發炎性疾病或骨病的預防或治療用醫藥組成物。
