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