The present invention provides a compound represented by the following formula [1] or a pharmaceutically acceptable salt thereof which has an excellent NHE3 inhibitory effect: €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ[Formula 15]€ƒ€ƒ€ƒ€ƒ€ƒA-Y [1] wherein A represents a structure represented by the following formula [2]: wherein R 11 and R 12 each represent a halogen atom or the like, R 2 represents C 1-6 alkyl or the like, ring E represents triazole, tetrazole, pyrimidine, or the like, R 31 and R 32 each represent a hydrogen atom, C 1-6 alkyl, C 1-6 alkoxy, or the like, and W represents a single bond, the formula -NH-, the formula -O-, or the formula -CONH-, and Y represents a hydrogen atom or a structure represented by the following formula [3]:
