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