Prototropic Tautomerism and C3 Bond Formation in 4-Hydroxycoumarin: Anion Delocalization and Acid–Base Behavior
4-Hydroxycoumarin is a derivative formed by introducing a hydroxyl group at C4 of the α-pyrone ring of coumarin. Its systematic name is 4-hydroxy-2H-chromen-2-one. Its C4 hydroxyl group differs from an ordinary phenolic hydroxyl group on the benzene ring. In the predominant ...
危险品化学品经营许可证（带存储）