Lithium aluminium hydride   、                                                                                      Ethyl 7,9-dimethoxy-3-methyl-2,3,4,7a-tetrahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinoline-7a-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
Sodium sulfate-III   、                                                                                                  silica gel   、                                                                                                  
methanol-dichloromethane                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 2.5h,
                                                                                                                以to yield the pure product 5-(hydroxymethyl) thebaine 3 as a pale yellow solid (0.036 g, 81% yield) with mp 169-171° C的产率得到(7,9-dimethoxy-3-methyl-2,3,4,7a-tetrahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinolin-7a-yl)methanol