The present invention provides a medical drug containing a compound represented by general formula (1), a pharmaceutically acceptable salt thereof, or a solvate of the compound or salt. The following are provided: the compound represented by general formula (1) (In the formula, Ar is an aryl group or a 5-6 membered ring type heteroaryl group containing a nitrogen atom, oxygen atom or sulfur atom； Y is a hydrogen atom, a C1-C6 alkyl group, or the like； A is a C1-C3 alkylene chain optionally substituted with two C1-C2 alkyl groups； X is a hydrogen atom or a halogen atom； V is an oxygen atom or a methylene chain； and R is a group selected from among formulae)； the pharmaceutically acceptable salt thereof； or a solvate of the compound or salt.
