乙酸酐 、
(2S)-5,7-dihydroxy-6-[(3R,4S)-7-hydroxy-3-(3-hydroxy-2,4-dimethoxyphenyl)-3,4-dihydro-2H-chromen-4-yl]-2-(4-hydroxyphenyl)-2,3-dihydrochromen-4-one 在
吡啶 作用下,
以11 mg的产率得到Acetic acid (3R,4S,2'S)-7,7'-diacetoxy-3-(3-acetoxy-2,4-dimethoxy-phenyl)-2'-(4-acetoxy-phenyl)-4'-oxo-3,4,3',4'-tetrahydro-2H,2'H-[4,6']bichromenyl-5'-yl ester