| 摘要 |
<p>Novel benzimidazole derivatives of the formula: <IMAGE> (I) wherein R1 is an alkyl group having 1 to 3 carbon atoms, allyl group, propargyl group, or phenyl group; R2 is hydrogen atom or an alkyl group having 1 to 3 carbon atoms; and n is 2 or 3, or pharmaceutically acceptable acid addition salts thereof, which have excellent antihistaminic activities and are useful as antiallergics for various allergic diseases, and a process for the preparation thereof, and an antihistaminic composition containing the compound as an active ingredient.</p> |
