4-Bromo-6-methoxy-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Bromo-2-chloro-4-(difluoromethyl)-6-(trifluoromethoxy)pyridine
4-Bromo-2-methoxy-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride
5-Bromo-3-methoxy-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride