| 摘要 |
1,4-Dihydro-4-oxoquinoline derivs. of formula (I) and their pharmaceutically acceptable salts are new. In (I), R'=C1-4 lower alkyl, 2-fluoroethyl, cyclopropyl, 4-fluorophenyl or 2,4-difluorophenyl; R2= 1,2,3,4-tetrahydro-2-isoquinolinyl, 1,2,3,4-tetrahydro-7-amino-2-isoquinolinyl, 1,2,3,4-tetrahydro-7- methylamino-2- isoquinolinyl, 5,6,7,8-tetrahydro-1,6- naphthyridin-6-yl, 5,6,7,8-tetrahydro-1,7naphthyridin-7-yl, 1,2,3,4-tetrahydro-2,6-naphthyridin-2-yl, 1,2,3,4-tetrahydro- 2,7- naphthyridin-2-yl or 2-isoindolinyl; X'=H,F,Cl or OCH3; X2=H or NH2. (I) are useful as antibiotic.
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