4-(Chloromethyl)-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-5-sulfonyl chloride
5-(Fluoromethyl)-4-iodo-2-(trifluoromethoxy)pyridine
4-Chloro-5-cyano-2-(difluoromethyl)-3-nitropyridine
3-Fluoro-2-methyl-6-(trifluoromethoxy)pyridine-5-sulfonyl chloride