2-Chloro-3-hydroxy-6-(trifluoromethoxy)pyridine-4-carboxylic acid
2-Chloro-3-hydroxy-4-(trifluoromethoxy)pyridine-6-carboxylic acid
3-Bromo-6-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-carboxylic acid
5-Bromo-4-methoxy-2-(trifluoromethoxy)pyridine-3-acetic acid