Methyl 3-hydroxy-5-nitro-2-(trifluoromethoxy)pyridine-6-acetate
Methyl 3-hydroxy-5-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-2-acetate
Methyl 3-hydroxy-4-nitro-6-(trifluoromethoxy)pyridine-2-acetate
Methyl 3-hydroxy-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-6-acetate