| abstract |
[PROBLEMS] n To provide a compound useful as an agent for the treatment of circulatory diseases, nervous system diseases, metabolic diseases, reproductive system diseases, and digestive tract diseases. n [MEANS FOR SOLVING PROBLEMS] n The compound, which is for use as an active ingredient, is represented by the formula (I): n n n n n n n n n n [wherein R 1 represents optionally halogenated C 1-6 alkyl, etc.; R 2 represents, e.g., a group represented by the formula (II-1) or (II-4) n n n n n n n n n n (wherein W represents C 1-6 alkylene, etc. and R represents C 1-6 alkyl, etc.); R 3 represents hydrogen, C 1-6 alkyl, etc.; X represents —O—, —NH—, etc.; and Y 1 , Y 2 , Y 3 , and Y 4 each independently represents —CH—, —N—, etc.]. |