Disclosed is a compound represented by the formula (I) below, which has a glucokinase-activating effect and is thus useful for treatment of diabetes or obesity, or a pharmaceutically acceptable salt thereof. In the formula, R 1 represents an aryl or the like； R 1 represents an aryl or the like； R 2 represents a formyl or the like, R 3 represents a C 1-6 alkyl or the like； R 3 represents a hydrogen atom or the like； Z 1 represents -O- or the like； Z 2 represents -O- or the like； Y 1 - Y 4 respectively represent a carbon atom or a nitrogen atom； ring A represents a heteroaryl group； X represents a carbon atom or the like； m represents an integer of 0-2； and q represents an integer of 0-2.
