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