Quinolonecaboxylic acid derivatives represented by general formula (I) or salts of these. Preferred are compounds wherein R2 represents optionally substituted cycloalkyl, R3 represents at least one member selected among hydrogen, halogeno, optionally substituted lower alkyl or alkoxy, and optionally protected hydroxy or amino, R4 represents hydrogen or optionally substituted lower alkyl, R5 and R6 each represents hydrogen, and A represents C-Y (where Y represents halogeno, lower alkyl or alkoxy each optionally substituted by halogeno, or optionally protected hydroxy).
通式(I)代表的
喹啉酮酸衍
生物或其盐类。其中 R2 代表任选取代的环烷基,R3 代表选自氢、卤素、任选取代的低级烷基或烷氧基、任选保护的羟基或
氨基中的至少一个成员,R4 代表氢或任选取代的低级烷基,R5 和 R6 各自代表氢,A 代表 C-Y(其中 Y 代表卤素、任选被卤素取代的低级烷基或烷氧基或任选保护的羟基)。