4-(Chloromethyl)-6-hydroxy-3-nitro-2-(trifluoromethoxy)pyridine
2-Hydroxy-3-iodo-6-(trifluoromethoxy)pyridine-4-sulfonyl chloride
4-(Chloromethyl)-2-hydroxy-3-nitro-5-(trifluoromethoxy)pyridine
2-Hydroxy-3-iodo-4-(trifluoromethoxy)pyridine-6-sulfonyl chloride