重氮甲烷 、
乙酸酐 、
(2R,3S,8R,9S,10S)-10-(2,4-Dihydroxy-phenyl)-8-(3,4-dihydroxy-phenyl)-2-(3-hydroxy-4-methoxy-phenyl)-3,4,9,10-tetrahydro-2H,8H-pyrano[2,3-f]chromene-3,5,9-triol 生成 (2R,3S,8R,9S,10R)-2,3-trans-8,9-trans-9,10-cis-3,9-diacetoxy-2,8-bis(3,4-dimethoxyphenyl)-10-(2,4-dimethoxyphenyl)-5-methoxy-3,4,9,10-tetrahydro-2H,8H-benzo<1,2-b; 3,4-b'>dipyran