聚合甲醛 、
(3Z)-5-fluoro-1H-indole-2,3-dione 3-(N-hydroxy-thiosemicarbazone) 、
环丙沙星 以90.62%的产率得到1-cyclopropyl-6-fluoro-7-[4-(5-fluoro-3-{(Z)-2-[(hydroxyamino)carbothioyl]hydrazono}-2-oxo-2,3-dihydro-1H-indol-1-ylmethyl)hexahydropyrazin-1-yl]-4-oxo-1,4-dihydroquinoline-3-carboxylic acid