聚合甲醛 、
(3Z)-5-fluoro-1H-indole-2,3-dione 3-(N-methoxy thiosemicarbazone) 、
诺氟沙星 以93.5%的产率得到1-ethyl-6-fluoro-7-[4-{[5-fluoro-3-((Z)-2-{[(methyloxy)amino]carbothioyl}hydrazono)-2-oxo-1H-indol-1(2H)-yl]methyl}tetrahydropyrazin-1(2H)-yl]-4-oxo-1,4-dihydroquinoline-3-carboxylic acid