2-Chloro-6-hydroxy-3-(trifluoromethoxy)pyridine-4-sulfonamide
6-Chloro-3-hydroxy-4-(trifluoromethoxy)pyridine-2-sulfonamide
5-Chloro-2-cyano-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine
3-Bromo-2-(chloromethyl)-6-(trifluoromethoxy)pyridine-5-carboxylic acid