3-Fluoro-2-mercapto-5-(3,4,5-trichlorophenyl)pyridine
3-Fluoro-2-mercapto-5-(2,4,6-trichlorophenyl)pyridine
3-Fluoro-2-mercapto-5-(2,3,4-trichlorophenyl)pyridine
5-Fluoro-3-iodo-2-(3,4,5-trichlorophenyl)pyridine
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