Patent ID: 6869950

Claim:
A benzimidazole derivative of the following formula (I), or its salt: wherein R 1 represents a lower alkyl group or a lower alkyloxy-lower alkyl group; R 2 represents an ethyl group, an n-butyl group, an n-pentyl group, an n-heptyl group, a methoxy group, an ethoxy group, and n-propyloxy group, an n-pentyloxy group, an n-hexyloxy group, an n-octyloxy group, a lower alkyloxy-lower alkyloxy group, a (cyclopentylmethyl)oxy group, an alkynyl group having 3 to 8 carbon atoms, a methylthio group, a lower alkanoylamino group, an N-substituted lower alkylamino group, or a morpholino group; R 3 represents a lower alkyl group, a lower alkenyl group, an aryl group, a lower alkylaryl group, an aryl-lower alkenyl group, or a halothienyl group; A represents a benzene ring; and X represents a halogen atom.