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