Methyl 6-cyano-4-methoxy-3-(trifluoromethoxy)pyridine-2-carboxylate
Ethyl 2-cyano-4-methoxy-3-(trifluoromethoxy)pyridine-6-carboxylate
3-Cyano-6-methoxy-4-(trifluoromethoxy)pyridine-2-carboxylic acid
5-Cyano-3-methoxy-4-(trifluoromethoxy)pyridine-2-carboxylic acid