5-Chloro-2-cyano-4-(trifluoromethoxy)pyridine-3-carboxylic acid
3-Chloro-5-cyano-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine
4-Chloro-5-cyano-2-(trifluoromethoxy)pyridine-3-carboxylic acid
3-Chloro-4-cyano-5-(trifluoromethoxy)pyridine-2-carboxylic acid