3-{[3-O-methylhexopyranosyl-(1->3)hexopyranosyl-(1->4)-[3-O-methylhexopyranosyl-(1->3)hexopyranosyl-(1->4)pentopyranosyl-(1->2)]pentopyranosyl]oxy}-18-oxo-18,20-epoxylanost-7-en-23-yl acetate 在
sodium methylate 作用下,
以
甲醇 为溶剂,
生成
desacetylstichloroside A1