A method for preventing or treating a metabolic disorder, an inflammatory disease, an autoimmune disease, an allergic disease, a central nervous system disease, a cardiovascular disease, a homeostasis-related disease or glaucoma, involving administering a compound or a salt thereof, the compound having the following formula (1): wherein R1 represents alkyl, cycloalkyl, aryl, heterocyclic or aralkyl; R7 represents cycloalkyl, aryl or heterocyclic; W represents oxygen or NR8, Y represents alkylene, Z represents oxygen, sulfur, OCO or NR9; R2, R3, R4, R6, R8 and R9 represent hydrogen or alkyl.