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