聚合甲醛 、
(3Z)-5-methyl-1H-indole-2,3-dione 3-(N-hydroxy-thiosemicarbazone) 、
洛美沙星 以81.22%的产率得到1-ethyl-6,8-difluoro-7-[4-(3-{(Z)-2-[(hydroxyamino)carbothioyl]hydrazono}-5-methyl-2-oxo-2,3-dihydro-1H-indol-1-ylmethyl)-3-methylhexahydropyrazin-1-yl]-4-oxo-1,4-dihydroquinoline-3-carboxylic acid