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