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