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