Methyl 2,4-dihydroxy-6-(trifluoromethoxy)pyridine-3-acetate
Methyl 4-(fluoromethyl)-3-methyl-2-(trifluoromethoxy)pyridine-6-acetate
Methyl 4-(fluoromethyl)-2-methyl-3-(trifluoromethoxy)pyridine-6-acetate
Methyl 3-(fluoromethyl)-2-methyl-6-(trifluoromethoxy)pyridine-4-acetate