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