5-Chloro-2-nitro-4-(trifluoromethoxy)pyridine-3-sulfonyl chloride
2-Chloro-3-(difluoromethyl)-5-hydroxy-6-(trifluoromethoxy)pyridine
4-Chloro-5-nitro-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
3-Bromo-4-(chloromethyl)-5-(difluoromethyl)-2-(trifluoromethoxy)pyridine