5,7-dihydroxy-6-prenyl-8,2',4',5'-tetramethoxyisoflavone 在
硫酸 作用下,
以
溶剂黄146 为溶剂,
生成 5-Hydroxy-10-methoxy-8,8-dimethyl-3-(2,4,5-trimethoxy-phenyl)-7,8-dihydro-6H-pyrano[3,2-g]chromen-4-one 、 5-Hydroxy-6-methoxy-2,2-dimethyl-9-(2,4,5-trimethoxy-phenyl)-3,4-dihydro-2H-pyrano[2,3-f]chromen-10-one