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