(4aR)-4a-methyl-7-(3-methylbut-3-en-1-ynyl)-1,2,3,4,4a,5,6,8a-octahydronaphthalene   、                                                                                      alkaline earth salt of/the/ methylsulfuric acid                                                                                                                                                              在
                                                                                                                                                                                 
吡啶                                                                                                                                  作用下,
                                                                                                                                                                                        反应 120.0h,
                                                                                                                生成                                                 (5R,17RS)-17-isopropyl-5,12-dimethyl-1,2,3,4,5,6,7,10,16,17-decahydrocyclopenta[a]phenanthren-15-one   、                                                                                             (5R,15RS)-15-isopropyl-5,12-dimethyl-1,2,3,4,5,6,7,10,15,16-decahydrocyclopenta[a]phenanthren-17-one