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