A quinolone synthetic antibacterial agent having excellent properties as a medicine is provided, which has strong antibacterial activity not only to Gram-negative bacteria but also to Gram-positive cocci that have low sensitivity to quinolone antibacterial agents, and which exhibits high safety and excellent pharmacokinetics. A compound represented by the formula (I) or a salt thereof, or a hydrate thereof. Specifically, a quinolone derivative of the formula (I) wherein substituents R6 and R7 taken together with the carbon atoms to which they are bonded form a cyclic structure which may contain an oxygen atom as a ring constituent atom, the cyclic structure forming a 5-4, 5-5, or 5-6 fused bicyclic pyrrolidinyl substituent, the substituent being bonded to a quinolone mother skeleton Q containing a pyridobenzoxazine structure.
提供了一种具有优良药物特性的
喹诺酮合成抗菌剂,其不仅对革兰氏阴性菌具有强烈的抗菌活性,而且对对
喹诺酮抗菌剂敏感性较低的革兰氏阳性球菌也具有强烈的抗菌活性,并表现出高安全性和优异的药代动力学特性。化合物的公式(I)或其盐,或其
水合物。具体来说,公式(I)的
喹诺酮衍
生物,其中取代基R6和R7与它们结合的碳原子形成一个环状结构,该环状结构可能包含一个氧原子作为环成分原子,环状结构形成一个5-4、5-5或5-6融合的双环
吡咯烷基取代基,该取代基与含有
吡啶苯并噁嗪结构的
喹诺酮母骨架Q结合。