4-Chloro-3-nitro-2-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
3-Chloro-4-nitro-2-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
3-Chloro-2-nitro-4-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
6-Chloro-3-nitro-2-(trifluoromethoxy)-4-(trifluoromethyl)pyridine