4-Cyano-2-hydroxy-5-(trifluoromethoxy)pyridine-3-carboxylic acid
Methyl 2-chloro-4-cyano-3-(trifluoromethoxy)pyridine-6-carboxylate
5-Cyano-3-hydroxy-2-(trifluoromethoxy)pyridine-4-carboxylic acid
3-Cyano-5-hydroxy-4-(trifluoromethoxy)pyridine-2-carboxylic acid