3Lesher GY,Singh B,Reuman M,et al.Pyridinylfluoroquinolonecarboxylic acid as antibacterials and their preparation[P].EP 417669,1991-03-20.
4Masuzawa K,Suzue S,Hirai K,et al.Preparation of 8-alkoxyquinolonecarboxylic acids as antibacterials with selective toxicity[P].EP 230295,1987-06-29.
5Sanchez JP,Gogliotti RD,Domagala JM,et al.The synthesis,structure-activity,and structure-side effect relationships of a series of 8-alkoxy-and 5-amino-8-alkoxyquinolone antibacterialagents[J].J Med Chem,1995,38(22):4478-4487.
6Iwata,Kimura,Fujiwara,et al.Quinoline-3-carboxylic acids derivatives,their preparation and use[P].EP 241206,1987-03-31.
7Takagi N,Tubasami H,Matsukubo H.16,7-substitute-8-alkoxy-1-cyclopropyl-1,4-dihydro-4-oxo-3quinolinecarboxylic acid(O3,O4) bis (acyloxy-O) borates and the salts thereof,and methods for their manufacture[P].EP 464823,1992-01-08.