2,3-Dihydroxy-5-(trifluoromethoxy)pyridine-6-sulfonyl chloride
2-Hydroxy-3-methyl-6-(trifluoromethyl)pyridine
4-(Chloromethyl)-5-(difluoromethyl)-3-(trifluoromethyl)pyridine-2-sulfonyl chloride
2-(Difluoromethyl)-3-methoxy-6-nitropyridine-5-sulfonyl chloride