The present invention provides a compound represented by the formula (1) or a pharmaceutically acceptable salt thereof (wherein W represents a hydrogen atom, a halogen atom, or the others； A represents an alkyl group optionally substituted by aryl group or the others, an aryl group, or the others； and one of X and Y represents a di-substituted alkylaminocarbonyl group, or the others, and the other represents a hydrogen atom, an alkyl group, an alkylcarbonyl group, or the others)； a medicament or a pharmaceutical composition for treatment or prophylaxis of FAAH-related diseases such as depression, anxiety disorder or pains, comprising the compound or the like as an active ingredient； a use of the compound or the like； and a method for treatment or prophylaxis using the compound or the like.
