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