| 摘要 |
<p>Process for the preparation of useful antimicorbial agents, 1-substituted-6-fluoro-7-(1-piperazinyl or 4-substituted-1-piperazinyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acids having the chemical structure [IV], <IMAGE> [IV] wherein R1 is ethyl or vinyl group, and R4 is <IMAGE> (R3 is hydrogen atom or lower alkyl group).</p> |
