INDOLYLPIPERIDINE DERIVATIVES AS ANTIHISTAMINIC AND ANTIALLERGIC AGENTS

摘要

Indolylpiperidine compounds of formula (I) wherein: A1 represents an alkylen e, alkyleneoxy, alkylenethio, alkanoyl or hydroxyalkylene group; A2 represents a single bond, an alkylene or alkenylene group; W represents a single bond or a phenylene or furanylene group which is unsubstituted or substituted by one o r more halogen atoms, alkoxy groups and/or alkyl groups; R2 represents a hydrogen or halogen atom or an alkyl or alkoxy group; and R3 represents a carboxyl group or a tetrazolyl group. The present invention provides novel indolylpiperidine compounds having improved antihistamine and antiallergic activity.