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