Methyl 4-cyano-6-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-carboxylate
3-(Bromomethyl)-2-cyano-4-nitro-5-(trifluoromethoxy)pyridine
3-Cyano-6-nitro-4-(trifluoromethoxy)pyridine-2-methanol
6-(Bromomethyl)-2-cyano-4-nitro-3-(trifluoromethoxy)pyridine