2,3-Difluoro-5-(perchlorophenyl)pyridine
2,3-Difluoro-4-(perchlorophenyl)pyridine
3-Chloro-4-(perchlorophenyl)-2,5,6-(trifluoro)pyridine
6-Chloro-2-fluoro-3-(perchlorophenyl)pyridine
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