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