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