(1S,3R,4aS,10aS)-7-Isopropyl-5,6,8,10-tetramethoxy-1,4a-dimethyl-1,2,3,4,4a,10a-hexahydro-phenanthren-3-ol 在
盐酸 、 iron(II) sulfate 作用下,
生成
(4bS,6R,8S,8aR)-6-Hydroxy-2-isopropyl-1,3,4-trimethoxy-4b,8-dimethyl-4b,6,7,8,8a,10-hexahydro-5H-phenanthren-9-one