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