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