在
                                                                                                                                                                                 sodium tetrahydroborate   、                                                                                                  
对甲苯磺酸                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 (3S,4aS,6R)-3,4a,6-Trimethyl-1-((R)-1-naphthalen-1-yl-ethyl)-hexahydro-3,6-methano-[1,8]naphthyridine-2,7-dione   、                                                                                             
(3S,4aS,6R)-3,4a,6-Trimethyl-1-((R)-1-naphthalen-1-yl-ethyl)-hexahydro-3,6-methano-[1,8]naphthyridine-2,7-dione