2-Cyano-4-hydroxy-3-(trifluoromethoxy)pyridine-5-carboxylic acid
3-Cyano-6-methoxy-4-(trifluoromethoxy)pyridine-2-sulfonamide
2-Cyano-3-hydroxy-5-(trifluoromethoxy)pyridine-6-carboxylic acid
5-Cyano-2-methoxy-3-(trifluoromethoxy)pyridine-4-sulfonamide