(4a
S)-7
t-(α-hydroxy-isopropyl)-1
t,4b-dimethyl-(4b
t,8a
c,10a
t)-dodecahydro-4a
r,1
c-oxaethano-phenanthren-12-one 在
lithium aluminium tetrahydride 、
乙醚 作用下,
生成
(4aS)-7t-(α-Hydroxy-isopropyl)-1c-hydroxymethyl-1t,4b-dimethyl-(4bt,8ac,10at)-dodecahydro-[4ar]phenanthrol