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