2-Bromo-5-(difluoromethyl)-6-nitro-3-(trifluoromethoxy)pyridine
2-Bromo-5-(difluoromethyl)-4-nitro-3-(trifluoromethoxy)pyridine
5-Bromo-3-nitro-2-(trifluoromethoxy)pyridine-4-sulfonamide
6-Bromo-4-(difluoromethyl)-2-nitro-3-(trifluoromethoxy)pyridine