124668-23-1 7H-Pyrido(1,2,3-de)-1,4-benzoxazine-6-carboxylic acid, 10-(3-amino-3-methyl-1-azetidinyl)-9-fluoro-2,3-dihydro-3-methyl-7-oxo-, (S)- 9-Fluoro-3-methyl-10-(3-amino-3-methylazetidin-1-yl)-7-oxo-2,3-dihydro-7H-pyrido-(1,2,3-de)-1,4-benzoxazine-6-carboxylic acid E 4497 E-4497