2-[(1S,5R)-5-((1aR,3aR,3bS,5aR,6R,8aS,8bS,10R,10aR)-10-Ethoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-1-methyl-hexyloxy]-tetrahydro-pyran                                                                                                                                                              在
                                                                                                                                                                                 
硫酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 4.0h,
                                                                                                                以96%的产率得到(3S,8S,9S,10R,13R,14S,17R)-17-((1R,5S)-5-Hydroxy-1-methyl-hexyl)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol