4-Nitro-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-6-sulfonyl chloride
4-Nitro-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-3-sulfonyl chloride
3-Nitro-5-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-2-sulfonyl chloride
4-Nitro-6-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-3-sulfonyl chloride