2-甲基-2-戊烯   、                                                                                      (1aS,3aR,3bS,5aR,6R,8aS,8bS,10R,10aR)-6-((R)-3-Iodo-1-methyl-propyl)-10-methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalene                                                                                                                                                              在
                                                                                                                                                                                 
正丁基锂   、                                                                                                  
potassium tert-butylate                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 
(1aS,3aR,3bS,5aR,6R,8aS,8bS,10R,10aR)-6-((Z)-(R)-1,5-Dimethyl-oct-5-enyl)-10-methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalene   、