4-(Difluoromethyl)-6-nitro-2-(trifluoromethoxy)pyridine-3-acetic acid
4-(Difluoromethyl)-2-nitro-5-(trifluoromethoxy)pyridine-3-acetic acid
5-(Difluoromethyl)-3-nitro-2-(trifluoromethoxy)pyridine-4-acetic acid
5-(Bromomethyl)-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-6-carboxaldehyde