Methyl 4-hydroxy-3-methoxy-2-(trifluoromethoxy)pyridine-6-acetate
2-Hydroxy-3-methoxy-5-(trifluoromethoxy)pyridine-6-acetic acid
Methyl 4-hydroxy-2-methoxy-6-(trifluoromethoxy)pyridine-3-acetate
2-Hydroxy-3-methoxy-4-(trifluoromethoxy)pyridine-5-acetic acid