Ethyl 2-cyano-6-hydroxy-5-(trifluoromethoxy)pyridine-3-acetate
Ethyl 2-cyano-6-hydroxy-3-(trifluoromethoxy)pyridine-5-acetate
3-Cyano-2-hydroxy-4-(trifluoromethoxy)pyridine-6-carboxylic acid
2-Cyano-4-hydroxy-6-(trifluoromethoxy)pyridine-3-carboxylic acid