4-(Difluoromethyl)-3-nitro-2-(trifluoromethoxy)pyridine-5-carboxylic acid
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