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