Methyl 4-(difluoromethyl)-2-fluoro-6-(trifluoromethoxy)pyridine-3-carboxylate
4-Hydroxy-6-iodo-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Fluoro-5-hydroxy-2-methyl-4-(trifluoromethoxy)pyridine
5-Hydroxy-3-iodo-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride