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