2-Hydroxy-3-nitro-6-(trifluoromethoxy)-4-(trifluoromethyl)pyridine
2-Hydroxy-6-iodo-4-(trifluoromethoxy)pyridine-3-sulfonyl chloride
3-Hydroxy-2-methoxy-4-methyl-5-(trifluoromethoxy)pyridine
2-Hydroxy-5-iodo-6-(trifluoromethoxy)pyridine-3-sulfonyl chloride