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