2,3-Difluoro-4-(2,4,5-trichlorophenyl)pyridine
2,4-Difluoro-3-(perfluorophenyl)-6-(trifluoromethyl)pyridine
3,5-Difluoro-4-(perfluorophenyl)pyridine
3,5-Difluoro-2-(perfluorophenyl)pyridine
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