2-Mercapto-3-phenyl-5-(trifluoromethyl)pyridine
6-Hydroxy-3-phenyl-2-(trifluoromethyl)pyridine
2-Hydroxy-5-phenyl-3-(trifluoromethyl)pyridine
2-Hydroxy-3-phenyl-6-(trifluoromethyl)pyridine
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