The present invention relates to quinolonecarboxylic acid derivatives having more excellent and broad antibacterial activities than the existing quinolone-series antibiotics. More specifically, it pertains to novel quinolonecarboxylic acid derivatives represented by following formula 1, which have a derivative of 7-[8-(alkoxyimino)-2,6-diazaspiro[3.4]oct-6-yl] as a substituent, and pharmaceutically acceptable salts and isomers thereof:
Wherein, A is C—H, C—F, C—Cl, C—O—CH3 or N; Y is H or amino; R1 is cyclopropyl or 2,4-difluorophenyl; R2 is C1-4 alkyl; and R3 is H or C1-4 alkyl.
本发明涉及喹诺酸衍
生物,其具有比现有喹诺系列抗生素更卓越和广谱的抗菌活性。更具体地,本发明涉及由以下式1所表示的新型喹诺酸衍
生物,其具有7-[8-(alkoxyimino)-2,6-diazaspiro[3.4]oct-6-yl]衍
生物作为取代基,以及其药学上可接受的盐和异构体:其中,A是C-H、C-F、C-Cl、C-O-
CH3或N;Y是H或
氨基;R1是环丙基或2,4-二
氟苯基;R2是C1-4烷基;R3是H或C1-4烷基。