4-(Bromomethyl)-5-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
4-(Bromomethyl)-3-(difluoromethyl)-5-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-(Bromomethyl)-6-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
3-(Bromomethyl)-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-6-sulfonyl chloride