2-Hydroxy-4-nitro-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
6-Hydroxy-2-iodo-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
2-Hydroxy-3-nitro-6-(trifluoromethoxy)-4-(trifluoromethyl)pyridine
2-Hydroxy-6-iodo-4-(trifluoromethoxy)pyridine-3-sulfonyl chloride