The present invention is a thiobenzimidazole derivative represented by the following formula (1)
or a medically acceptable salt thereof wherein said thiobenzimidazole derivative and a medically acceptable salt thereof have a potent activity of inhibiting human chymase. Thus, they are potential preventive and/or therapeutic agents clinically applicable to various diseases in which human chymase is involved.
A benzimidazole derivative or its medically acceptable salt, represented by the following formula (1), that is a human chymase activity inhibitor capable of being applied clinically:
wherein, R1 and R2 represent a hydrogen atom, an alkyl group or an alkoxy group, etc., A represents an alkylene group or an alkenylene group, E represents -COOR3, -SO3R3, -CONHR3 or -SO2NHR3, etc., G represents an alkylene group, M represents a single bond or -S(O)m-, J represents a heterocyclic group, and X represents -CH= or a nitrogen atom.