生物活性方面,脱甲基左氧氟沙星是左氧氟沙星的代谢产物。左氧氟沙星是一种合成的氟喹诺酮类抗生素,能够抑制细菌DNA旋转酶的超螺旋活性,从而阻止DNA复制。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
左氧氟沙星 | levofloxacin | 100986-85-4 | C18H20FN3O4 | 361.373 |
左旋氧氟沙星羧酸 | levofloxacin Q-acid | 100986-89-8 | C13H9F2NO4 | 281.216 |
左氧氟环合酯 | (-)-ethyl 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido<1,2,3-de><1,4>benzoxazine-6-carboxylate | 106939-34-8 | C15H13F2NO4 | 309.269 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
左氧氟沙星 | levofloxacin | 100986-85-4 | C18H20FN3O4 | 361.373 |
—— | N‐nitrosonorlevofloxacin | 1152314-62-9 | C17H17FN4O5 | 376.344 |
—— | 2,3-dihydro-9-fluoro-3-methyl-10-[4-(4-hydroxyimino-2,3-dihydro-4H-1-benzopyran-3-yl)piperazin-1-yl]-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylic acid | 1185741-86-9 | C26H25FN4O6 | 508.506 |
Quinolones rapidly kill bacteria by two mechanisms, one that requires protein synthesis and one that does not. The latter, which is measured as lethal action in the presence of the protein synthesis inhibitor chloramphenicol, is enhanced by N-1 cyclopropyl and C-8 methoxy substituents, as seen with the highly lethal compound PD161144. In some compounds, such as levofloxacin, the N-1 and C-8 substituents are fused. To assess the effect of ring fusion on killing, structural derivatives of levofloxacin and PD161144 differing at C-7 were synthesized and examined with