(5R,6R,8S,9S,10R,13R,14S,17R)-6-Hydroxy-17-((R)-4-hydroxy-1,4-dimethyl-pentyl)-6,10,13-trimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-one                                                                                                                                                              在
                                                                                                                                                                                 
吡啶   、                                                                                                  
三氯氧磷                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 (5S,8R,9S,10R,13R,14S,17R)-17-((R)-1,4-Dimethyl-pent-3-enyl)-6,10,13-trimethyl-1,2,4,5,8,9,10,11,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-3-one