Methyl 3-chloro-2-(chloromethyl)-5-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 3-(bromomethyl)-2-cyano-6-(trifluoromethoxy)pyridine-5-acetate
Methyl 6-(bromomethyl)-2-cyano-3-(trifluoromethoxy)pyridine-4-acetate
Methyl 2-(bromomethyl)-5-cyano-6-(trifluoromethoxy)pyridine-3-acetate