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