Ethyl 3-cyano-2-methoxy-5-(trifluoromethoxy)pyridine-4-carboxylate
5-Chloro-4-hydroxy-3-nitro-2-(trifluoromethoxy)pyridine
Ethyl 2-cyano-6-methoxy-4-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 2-cyano-5-methoxy-6-(trifluoromethoxy)pyridine-3-carboxylate