乙酸酐 、
5-Hydroxy-8-[5-(5-hydroxy-7-methoxy-4-oxo-chroman-2-yl)-2-methoxy-phenyl]-2-(3-hydroxy-4-methoxy-phenyl)-7-methoxy-chroman-4-one 在
吡啶 作用下,
以20 mg的产率得到Acetic acid 8-[5-(5-acetoxy-7-methoxy-4-oxo-chroman-2-yl)-2-methoxy-phenyl]-2-(3-acetoxy-4-methoxy-phenyl)-7-methoxy-4-oxo-chroman-5-yl ester