左氟沙星
C18H20FN3O4=361.37 CAS-100986-85-4 (-)-(S)-9-氟-2,3-二氢-3-甲基-10-(4-甲基-1-哌嗪基)-7-氧代-7H-吡啶并[1,2,3-de]-1,4-苯并噁嗪-6-羧酸。 (-)-(S)-9-Fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid. 抗菌药。 Levofloxacin. INN,USAN. 
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