8-ethyl-3-hydroxy-2-(1-phenylcyclopropyl)quinoline-4-carboxylic acid 、
5-溴靛红 、
2-(1-(4-chlorophenyl)cyclopropyl)-2-oxoethyl acetate 以to yield Compound 18 (0.12 g, 29% yield)的产率得到6-bromo-2-(1-(4-chlorophenyl)cyclopropyl)-3-hydroxyquinoline-4-carboxylic acid