Methyl 5-hydroxy-3-nitro-2-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 3-hydroxy-5-nitro-4-(trifluoromethoxy)pyridine-2-carboxylate
4-Hydroxy-3-iodo-6-(trifluoromethoxy)pyridine-2-carbonyl chloride
4-Hydroxy-3-iodo-2-(trifluoromethoxy)pyridine-6-carbonyl chloride