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