Ethyl 5-cyano-4-nitro-3-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 5-cyano-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-acetate
Methyl 3-cyano-5-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-acetate
6-Cyano-4-(fluoromethyl)-2-nitro-3-(trifluoromethoxy)pyridine