3-Bromo-6-fluoro-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride
5-Bromo-4-fluoro-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
5-Bromo-2-methoxy-4-(trifluoromethoxy)pyridine-3-acetic acid
3-Bromo-2-methoxy-5-(trifluoromethoxy)pyridine-4-sulfonyl chloride