4-Cyano-2-(difluoromethyl)pyridine-5-sulfonyl chloride
4-(Chloromethyl)-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-5-sulfonyl chloride
2-(Bromomethyl)-4-(difluoromethyl)pyridine-3-carboxylic acid
5-(Bromomethyl)-2-cyano-4-(difluoromethyl)pyridine