2-Chlor-7-ethyl-12,13-dimethoxy-6-oxo-9,10-dihydroisochino<2,1-d><1,4>-benzodiazepiniumbromid                                                                                                                                                              在
                                                                                                                                                                                 sodium tetrahydroborate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                生成                                                 (7R,13bS)-12-Chloro-7-ethyl-2,3-dimethoxy-5,6,9,13b-tetrahydro-6a,9-diaza-benzo[6,7]cyclohepta[1,2-a]naphthalen-8-one   、                                                                                             (7S,13bS)-12-Chloro-7-ethyl-2,3-dimethoxy-5,6,9,13b-tetrahydro-6a,9-diaza-benzo[6,7]cyclohepta[1,2-a]naphthalen-8-one