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