这个词是什么意思？
QUINOLONES containing a 4-oxo (a carbonyl in the para position to the nitrogen). They inhibit the A subunit of DNA GYRASE and are used as antimicrobials. Second generation 4-quinolones are also substituted with a 1-piperazinyl group at the 7-position and a fluorine at the 6-position.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D042462 · MeSH 2026。
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