Ethyl 2-chloro-6-cyano-3-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 2-chloro-4-cyano-6-(trifluoromethoxy)pyridine-3-carboxylate
3-Chloro-6-cyano-2-(trifluoromethoxy)pyridine-5-acetic acid
5-Chloro-2-cyano-3-(trifluoromethoxy)pyridine-6-acetic acid