4-(Difluoromethyl)-2-nitro-5-(trifluoromethoxy)pyridine-3-sulfonamide
5-(Difluoromethyl)-3-nitro-2-(trifluoromethoxy)pyridine-4-sulfonamide
4-(Aminomethyl)-3-methyl-2-nitro-6-(trifluoromethoxy)pyridine
4-(Aminomethyl)-2-methyl-6-nitro-3-(trifluoromethoxy)pyridine