3-(Difluoromethyl)-6-fluoro-2-nitro-5-(trifluoromethoxy)pyridine
5-(Difluoromethyl)-2-fluoro-3-nitro-6-(trifluoromethoxy)pyridine
4-(Chloromethyl)-3-fluoro-2-nitro-5-(trifluoromethoxy)pyridine
6-Fluoro-4-(fluoromethyl)-3-(trifluoromethoxy)pyridine-2-acetonitrile