4-(Bromomethyl)-5-cyano-2-nitro-3-(trifluoromethoxy)pyridine
4-(Bromomethyl)-3-cyano-5-nitro-2-(trifluoromethoxy)pyridine
5-(Chloromethyl)-2-(difluoromethyl)-3-fluoro-4-(trifluoromethoxy)pyridine
4-(Bromomethyl)-6-cyano-2-nitro-3-(trifluoromethoxy)pyridine