| 摘要 |
<p>A quinolone- or naphthyridonecarboxylic acid derivative having a skeleton represented by general formula (I) at the 7-position and being useful as an antibacterial or a salt thereof, wherein R3 represents at least one group selected from among hydrogen, halogen, optionally substituted lower alkyl, lower alkoxy, lower alkylthio, nitro, cyano, optionally protected hydroxy and optionally protected amino; R4 represents at least one group selected from among hydrogen, optionally substituted lower alkyl, lower alkylidene and a group which forms a cycloalkane ring together with the carbon atom to which R4 is bonded; and R5 represents hydrogen, optionally substituted lower alkyl or cycloalkyl.</p> |
