Antibacterial agents which are excellent in antibacterial activity and safety and comprise compounds represented by general formula (I), their salts, or hydrates of the same, wherein R1 represents hydrogen or alkyl; R2 represents hydrogen or alkyl; R3 and R5 represent each hydrogen; R4 represents hydroxy, halogeno, carbamoyl, alkyl, alkoxy or alkylthio; R6 and R7 represent each hydrogen or alkyl; n is an integer of from 1 to 3; R4 and the substituent on the pyrrolidine ring of general formula (III) are arranged at the cis-configuration; and Q is a partial structure represented by general formula (a).
具有优异抗菌活性和安全性的抗菌剂,包括通式(I)代表的化合物、它们的盐或它们的
水合物,其中 R1 代表氢或烷基;R2 代表氢或烷基;R3 和 R5 各自代表氢;R4 代表羟基、卤素、
氨基甲酰基、烷基、烷氧基或烷
硫基;R6 和 R7 分别代表氢或烷基;n 为 1 至 3 的整数;R4 和通式(III)中
吡咯烷环上的取代基以顺式构型排列;以及 Q 为通式(a)所代表的部分结构。