Ethyl 2-cyano-3-hydroxy-6-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 2-cyano-3-hydroxy-5-(trifluoromethoxy)pyridine-4-carboxylate
6-Chloro-3-cyano-4-(trifluoromethoxy)pyridine-2-carboxaldehyde
5-Chloro-4-(chloromethyl)-3-(trifluoromethoxy)pyridine-2-carboxylic acid