(3'aS,4'S,7'S,7'aR)-4'-Hydroxy-7-methoxy-2',2'-dimethyl-7'-(tetrahydro-pyran-2-yloxy)-3'a,4',7',7'a-tetrahydro-[5,5']bi[benzo[1,3]dioxolyl]-6-carboxylic acid diethylamide 在
Dowex-H
(1+) resin 、
溶剂黄146 、
三氟乙酸 作用下,
以
四氢呋喃 为溶剂,
反应 12.0h,
生成 [6aS-(6aα,7α,8α,9β)]-6a,7,8,9-tetrahydro-4-methoxy-7,8,9-trihydroxy-5H-[1,3]benzodioxolo[5,6-c][1]benzopyran-5-one