Ethyl 2-cyano-3-hydroxy-4-(trifluoromethoxy)pyridine-5-carboxylate
2-Cyano-6-iodo-3-methoxy-4-(trifluoromethoxy)pyridine
Methyl 4-cyano-5-hydroxy-3-(trifluoromethoxy)pyridine-2-carboxylate
5-Chloro-4-hydroxy-2-(trifluoromethoxy)pyridine-3-carboxylic acid