3-(Difluoromethyl)pyridine-2-carboxylic acid
4-(Difluoromethyl)-5-methoxy-2-(trifluoromethyl)pyridine
3-(Chloromethyl)-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine-6-sulfonyl chloride
2-(Chloromethyl)-6-(difluoromethyl)-5-(trifluoromethoxy)pyridine-3-sulfonyl chloride