QUINOLONECARBOXYLIC ACID DERIVATIVE AND PROCESS FOR ITS PREPARATION

摘要

Title of the invention: Quinolonecarboxylic acid derivatives and their preparation of the invention: Quinolonecarboxylic acid derivatives of the following formula, wherein R is hydrogen atom or lower alkyl group, Alk is lower alkylene group and X is hydrogen atom or halogen atom; the hydrates and pharmaceutically acceptable salts thereof are useful as antibacterial agent.