4-(Difluoromethyl)-5-nitro-3-(trifluoromethoxy)pyridine-2-carboxylic acid
3-(Bromomethyl)-2-(difluoromethyl)-6-(trifluoromethoxy)pyridine-4-carboxaldehyde
4-(Difluoromethyl)-3-nitro-2-(trifluoromethoxy)pyridine-5-carboxylic acid
3-(Bromomethyl)-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine-6-carboxaldehyde