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