Ethyl 4-hydroxy-2-methoxy-3-(trifluoromethoxy)pyridine-5-acetate
5-Hydroxy-3-methoxy-2-(trifluoromethoxy)pyridine-4-acetic acid
Ethyl 5-hydroxy-3-methoxy-4-(trifluoromethoxy)pyridine-2-acetate
3-Hydroxy-5-methoxy-4-(trifluoromethoxy)pyridine-2-acetic acid