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