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METHOD OF OBTAINING 1-SUBSTITUTED 6-FLUORO-4-OXO-7-/1-PIPERAZINYL/-1,4-DIHYDROQUINOLINE-3-CARBOXYLIC ACID, NOVEL INTERMEDIATE USEFUL IN THAT METHOD AND METHOD OF OBTAINING SUCH INTERMEDIATE PRODUCT
METHOD OF OBTAINING 1-SUBSTITUTED 6-FLUORO-4-OXO-7-/1-PIPERAZINYL/-1,4-DIHYDROQUINOLINE-3-CARBOXYLIC ACID, NOVEL INTERMEDIATE USEFUL IN THAT METHOD AND METHOD OF OBTAINING SUCH INTERMEDIATE PRODUCT