Ethyl 5-cyano-3-hydroxy-4-(trifluoromethoxy)pyridine-2-acetate
Ethyl 5-cyano-4-hydroxy-3-(trifluoromethoxy)pyridine-2-acetate
Ethyl 6-cyano-4-hydroxy-3-(trifluoromethoxy)pyridine-2-acetate
4-Chloro-3-hydroxy-5-(trifluoromethoxy)pyridine-2-acetic acid