NOVEL 2-MERCAPTOBENZIMIDAZOLE DERIVATIVES, PROCESS FOR THEIR PREPARATION, AND ANTI-ULCERIC AGENTS CONTAINING THEM AS EFFECTIVE INGREDIENTS

摘要

Novel benzimidazole derivatives represented by general formula (I), and their acid addition salts, wherein R<1> and R<2>, which may be the same or different, each represents a hydrogen atom, a lower alkoxy group, a lower alkyl group, a trifluoromethyl group or a halogen atom, n represents an integer of 1 or 2, and Het represents a substituted or unsubstituted imidazolyl group or a pyridyl group. A process for their preparation and an anti-ulceric agent containing them as effective ingredients are also disclosed.