sodium (3β,12α,17α)-12,17-dihydroxy-18-oxo-18,20-epoxylanosta-7,25-dien-3-yl 3-O-methyl-β-D-glucopyranosyl-(1->3)-β-D-xylopyranosyl-(1->4)-6-deoxy-β-D-glucopyranosyl-(1->2)-4-O-sulfonato-β-D-xylopyranoside 在
吡啶 作用下,
以
1,4-二氧六环 为溶剂,
反应 2.5h,
以2 mg的产率得到(3β,12α,17α)-12,17-dihydroxy-18-oxo-18,20-epoxylanosta-7,25-dien-3-yl 3-O-methyl-β-D-glucopyranosyl-(1->3)-β-D-xylopyranosyl-(1->4)-6-deoxy-β-D-glucopyranosyl-(1->2)-β-D-xylopyranoside