Levofloxacin Intermediate CAS#:106939-34-8 Levofloxacin acid ester Product Name: Ethyl (S)-9,10-difluoro-3-methyl-7- ... -2,3-Dihydro-3-Methyl-7-Oxo-, Ethyl Ester, (3s)-;Levofloxacin carboxylic acid, ethyl ester;LEVOFLOXACINCYCLIZEDESTER;(3S)-9,10-Difluoro-2,3-dihydro ... -pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic Acid Ethyl Ester;9,10-Difluoro-3-(S)-methyl-7-oxo-2 ...