乙酸酐 、
diosgenin 3-O-α-L-rhamnopyranosyl(1<*>2)-β-D-glucopyranoside hexaacetate 在
zinc(II) chloride 作用下,
反应 20.0h,
以69%的产率得到23-acetyl-16β-acetoxy-22,26-epoxycholesta-5,22-dien-3β-yl-O-[(2,3,4-triacetyl)-O-α-L-rhamnopyranosyl-(1→2)-O-(3,4,6-triacetyl)]-O-β-D-glucopyranoside