pyridinium 9-fluoro-6,7-dihydro-8-(4-hydroxy-1-piperidyl)-2-methoxycarbonyl-5-methyl-1-oxo-1H,5H-benzoquinolizine sulfate 在
氢氧化钾 作用下,
以
甲醇 为溶剂,
以38%的产率得到9-fluoro-6,7-dihydro-5-methyl-8-(4-sulfoxy-1-piperidyl)-1-oxo-1H,5H-benzo
quinolizine-2-carboxylic acid