Imidazole derivatives or salts thereof and drugs containing the derivatives or the salts

An imidazole derivative represented by formula (1), or a salt thereof:

• wherein each of R1 and R2, independently represents a hydrogen atom, an alkyl group, a halogen atom, an aryl group which may be substituted, or a heteroaryl group which may be substituted;
• (1) A represents N or CH, and one of X1 and X2 represents N, the other represents CH, or (2) A represents N, and X1 and X2 each represents CH;
• each of Y and Z, independently represents O, S, SO, SO2, CH2, NH, or N—R6, wherein R6 represents an alkyl group, an aryl group which may be substituted, or a heteroaryl group which may be substituted;
• each of R3, R4, and R5, independently represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, a halogenoalkyl group, a nitro group, an amino group, a hydroxyl group, a cyano group, an acyl group, a carboxyl group, a carbamoyl group, a substituted amide group, a substituted sulfonamido group, or a phenyl group which may be substituted;
• m is a number of 1 to 4;
• and n is a number of 0 to 4.