4-Hydroxy-2-nitro-5-(trifluoromethoxy)pyridine
6-Hydroxy-3-iodo-2-(trifluoromethoxy)pyridine
3-Hydroxy-5-nitro-4-(trifluoromethoxy)pyridine
2-Hydroxy-3-iodo-6-(trifluoromethoxy)pyridine
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