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