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