The purpose of the present invention is to provide a pharmaceutical composition that is useful for the treatment of diseases that are caused by an increase in bone resorption and that does not cause serious side effects even when used in combination with another drug. The present invention relates to: an α-oxoacyl amino-caprolactam that is represented by formula (I)
(in formula (I), X represents N or CH, Y represents O or CH
2
, and Z represents S or CH
2
); and a bone resorption inhibitor containing the α-oxoacyl amino-caprolactam.
本发明的目的是提供一种药物组合物,用于治疗由骨吸收增加引起的疾病,并且即使与另一种药物联合使用也不会引起严重副作用。本发明涉及:由式(I)表示的α-氧代酰
氨基
己内酯
(在式(I)中,X代表N或CH,Y代表O或CH
2
,Z代表S或CH
2
);以及含有α-氧代酰
氨基
己内酯的骨吸收
抑制剂。