24-Tosyloxy-3β-hydroxy-Δ12-oleanen-30-saeure-methylester                                                                                                                                                              在
                                                                                                                                                                                 lithium aluminium tetrahydride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (3S,4S,4aR,6aR,6bS,8aS,11R,12aR,14aR,14bR)-4,11-Bis-hydroxymethyl-4,6a,6b,8a,11,14b-hexamethyl-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,14,14a,14b-icosahydro-picen-3-ol