3-(Bromomethyl)-6-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-(Bromomethyl)-6-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-2-carbonyl chloride
5-(Difluoromethyl)-4-iodopyridine-2-carboxylic acid
3-(Bromomethyl)-5-(difluoromethyl)-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride