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