4-(Chloromethyl)-5-(difluoromethyl)-3-(trifluoromethyl)pyridine-2-sulfonyl chloride
2-(Difluoromethyl)-3-methoxy-6-nitropyridine-5-sulfonyl chloride
4-Chloro-2-mercapto-6-(trifluoromethyl)pyridine
3-Bromo-2-(chloromethyl)-4-(trifluoromethoxy)-6-(trifluoromethyl)pyridine