John M. Domagala, Phred Peterson. New 7-Substituted Quinolone Antibacterial Agents. II. The Synthesis of 1-Ethyl-1,4-dihydro-4-oxo-7-(pyrazolyl, isoxazolyl, and pyrimidinyl)-1,8-naphthyridine and quinolone-3-carboxylic Acids.
J. Heter. Chem., 1989, Volume 26, pp. 1147-1158.
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