2-Chloro-3-(difluoromethyl)-4-nitro-6-(trifluoromethoxy)pyridine
3-Chloro-2-(chloromethyl)-6-iodo-5-(trifluoromethoxy)pyridine
5-Chloro-2-(fluoromethyl)-3-nitro-6-(trifluoromethoxy)pyridine
6-Chloro-2-(chloromethyl)-3-iodo-4-(trifluoromethoxy)pyridine