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