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