(+/-)-(E)-1-<5',7'-dimethoxy-2'-methyl-2'-(4''-methylpent-3''-en-1''-yl)-2'H-chromen-8'-yl>-3-phenyl-prop-2-en-1-one 在
硫酸 作用下,
反应 8.0h,
生成 (+/-)-(E)-1-(5'-isopropylidene-7',9'-dimethoxy-2'-methyl-3',4',5',6'-tetrahydro-2',6'-methano-2'H-1'-benzoxocin-10'-yl)-3-phenylprop-2-en-1-one