4-Fluoro-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride
5-Bromo-2-(chloromethyl)-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine
2-Methoxy-5-methyl-6-(trifluoromethoxy)pyridine-3-carbonyl chloride
4-Chloro-2-(difluoromethyl)-3-iodopyridine-6-acetic acid