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