4-Chloro-2-hydroxy-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
5-Bromo-2-(fluoromethyl)-4-(trifluoromethoxy)pyridine-3-carboxylic acid
3-Chloro-5-hydroxy-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-Bromo-5-(fluoromethyl)-2-(trifluoromethoxy)pyridine-3-carboxylic acid