methyl (13Z,15E,17E,22E,24Z)-3β-acetoxy-12-oxomalabarica-13,15,17,22,24-pentaen-26-oate                                                                                                                                                              在
                                                                                                                                         palladium on activated charcoal                                                                                                                                                                                                                               
氢气                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 18.0h,
                                                                                                                生成                                                 
2,6-Dimethyl-10-((3S,3aR,5aR,9aR,9bR)-3a,6,6,9a-tetramethyl-2,7-dioxo-dodecahydro-cyclopenta[a]naphthalen-3-yl)-undecanoic acid methyl ester