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