Levofloxacin hydrochloride 是一种广谱的第三代氟喹诺酮类抗生素,是氧氟沙星的光学活性 L-异构体,具有抗菌活性。左氧氟沙星通过细菌细胞壁扩散并通过抑制 DNA 促旋酶(细菌拓扑异构酶 II)起作用,这是一种 DNA 复制、RNA 转录和细菌 DNA 修复所需的酶。 DNA 促旋酶活性的抑制导致细菌细胞生长受阻。
Desmethyl Levofloxacin, a metabolite of levofloxacin, is associated with a synthetic fluoroquinolone antibacterial drug that inhibits the super-coiling activity of bacterial DNA gyrase, thereby preventing DNA replication.
Levofloxacin sodium is a synthetic fluoroquinolones antibacterial. It inhibits the supercoiling activity of bacterial DNA gyrase, so that halting DNA replication.
Levofloxacin mesylate 是一种口服有效的抗生素,抑制革兰氏阳性和阴性细菌。其作用机制为抑制 DNA 促旋酶 (DNA gyrase) 和拓扑异构酶 IV (topoisomerase IV)。Levofloxacin mesylate 适用于慢性牙周炎、气道炎症和 BK 病毒血症的研究,并具有抗正痘活性。
Antofloxacin is a well-tolerated, orally active, and broad-spectrum 8-amino-fluoroquinolone compound that exhibits potent antibacterial properties. It demonstrates superior activity against gyrA mutation-positive Helicobacter pylori strains, particularly in strains with mutations in the Asn87 position, when compared to levofloxacin. Additionally, Antofloxacin acts as a weak but reversible inhibitor of CYP1A2 and is clinically used to treat infections caused by various bacterial species.