Methyl 3-(difluoromethyl)-2-nitro-5-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 6-(difluoromethyl)-2-nitro-3-(trifluoromethoxy)pyridine-4-carboxylate
5-(Bromomethyl)-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-6-carboxaldehyde
4-(Bromomethyl)-3-(difluoromethyl)-6-(trifluoromethoxy)pyridine-2-carboxaldehyde