4-Chloro-6-cyano-3-nitro-2-(trifluoromethoxy)pyridine
4-Bromo-3-(chloromethyl)-5-(difluoromethyl)-2-(trifluoromethoxy)pyridine
4-Bromo-6-(chloromethyl)-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine
4-Chloro-2-cyano-3-nitro-5-(trifluoromethoxy)pyridine