[Cl-].[OH:2][CH:3]1[CH2:6][NH:5][CH2:4]1.C1CCN2C(=NCCC2)CC1.N1C=CC=CC=1.[NH2:24][C:25]1[CH:26]=[C:27]([N:33]2[C:42]3[C:37](=[CH:38][C:39]([F:45])=[C:40](F)[C:41]=3[CH3:43])[C:36](=[O:46])[C:35]([C:47]([OH:49])=[O:48])=[CH:34]2)[C:28]([CH3:32])=[CH:29][C:30]=1[F:31]>C(OCC)C>[NH2:24][C:25]1[CH:26]=[C:27]([N:33]2[C:42]3[C:37](=[CH:38][C:39]([F:45])=[C:40]([N:5]4[CH2:6][CH:3]([OH:2])[CH2:4]4)[C:41]=3[CH3:43])[C:36](=[O:46])[C:35]([C:47]([OH:49])=[O:48])=[CH:34]2)[C:28]([CH3:32])=[CH:29][C:30]=1[F:31]70 mg of 3-hydroxyazetidine monochloride, 200 mg of 1,8-diazabicyclo[5.4.0]-7-undecene, and 200 mg of pyridine were stirred at 80° C., and to this mixture was added 150 mg of 1-(3-amino-4-fluoro-6-methylphenyl)-6,7-difluoro-8-methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid. The mixture was stirred at 90° C. for 20 minutes. Diethylether was added to the reaction solution, and the solution was decanted. 1 ml of ethanol was added to the residue and the solid precipitate was collected by filtration and dried to obtain 70 mg of the title compound.
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