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