ethyl 10-(1-t-butoxycarbonyl-3-pyrrolidinyloxy)-9-fluoro2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de][1,4]-benzoxazine-6-carboxylate 、
盐酸 、 在
乙醇 作用下,
以
溶剂黄146 为溶剂,
以whereby 50 mg of the title compound was obtained的产率得到10-(3-Pyrrolidinyloxy)-9-fluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de][1,4]-benzoxazine-6-carboxylic acid hydrochloride