4-Fluoro-6-hydroxy-3-methoxy-2-(trifluoromethoxy)pyridine
4-Fluoro-2-hydroxy-3-methoxy-5-(trifluoromethoxy)pyridine
5-Fluoro-3-hydroxy-4-methoxy-2-(trifluoromethoxy)pyridine
3-Fluoro-5-hydroxy-2-methoxy-4-(trifluoromethoxy)pyridine
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