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