5-Bromo-2-fluoro-3-(trifluoromethoxy)pyridine-4-carboxylic acid
5-Bromo-3-iodo-4-(trifluoromethoxy)pyridine-2-carboxylic acid
3-Bromo-5-iodo-2-(trifluoromethoxy)pyridine-4-carboxylic acid
4-Bromo-3-fluoro-2-(trifluoromethoxy)pyridine-5-carboxylic acid