5-Nitro-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-sulfonyl chloride
4-Nitro-5-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-2-sulfonyl chloride
5-Nitro-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-2-sulfonyl chloride
3-Nitro-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-5-sulfonyl chloride