PIPERAZINYLBENSOHETEROCYKLISKA FORENINGAR OCH FORFARANDE FOR FRAMSTELLNING DERAV

摘要

A benzoheterocyclic compound of the formula (I) (I) wherein R1, R2, R3 and n are as defined, and its pharmaceutically acceptable salts, processes for preparing same and antibacterial composition containing the benzoheterocyclic compound as an active ingredient and a pharmaceutically acceptable carrier are disclosed.