abstract |
(57) Abstract: A synthetic intermediate of a quinolinecarboxylic acid derivative useful as an antibacterial agent is provided. SOLUTION: Formulas (1), (2), (3), (4), Compound of (5) (In the formula, R 8 is a lower alkyl group or a halogeno lower alkyl group, R 7a is a lower alkyl group, and R 9 is a lower alkyl group.) |