(S)-7-<3-(acetylamino)-1-pyrrolidinyl>-6,8-difluoro-1,4-dihydro-1-(methylamino)-4-oxo-3-quinolinecarboxylic acid ethyl ester 、 alkaline earth salt of/the/ methylsulfuric acid 以
水 为溶剂,
反应 30.0h,
以90%的产率得到(S)-7-<3-(acetylamino)-1-pyrrolidinyl>-6,8-difluoro-1,4-dihydro-1-<(hydroxymethyl)methylamino>-4-oxo-3-quinolinecarboxylic acid ethyl ester