8-ethyl-3-hydroxy-2-(1-phenylcyclopropyl)quinoline-4-carboxylic acid 、
5-三氟甲氧基吲哚-2,3-二酮 、 、
sodium hydroxide 以Compound 90 was obtained as a yellow powder (0.0637 g, 17.0% yield)的产率得到3-hydroxy-6-(trifluoromethoxy)-2-(1-(4-(trifluoromethyl)phenyl)cyclopropyl)quinoline-4-carboxylic acid