2α-Methyl-12-oxo-4bβ,8β-dimethyl-3β,10aβ-ethano-4aαH,8aαH-perhydrophenanthren-1β,8α-dicarbonsaeure-dimethylester 在
sodium tetrahydroborate 作用下,
生成 2α-Methyl-12-(anti-2)-hydroxy-4bβ,8β-dimethyl-3β,10aβ-ethano-4aαH,8aαH-perhydrophenanthren-1β,8α-dicarbonsaeure-dimethylester