5-Chloro-3-nitro-4-(trifluoromethoxy)pyridine-2-carboxylic acid
3-Bromo-4-(chloromethyl)-2-(difluoromethyl)-6-(trifluoromethoxy)pyridine
3-Bromo-2-(chloromethyl)-6-(difluoromethyl)-4-(trifluoromethoxy)pyridine
4-Chloro-3-(difluoromethyl)-2-fluoro-5-(trifluoromethoxy)pyridine