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