4-苯基-1,2,4-三唑啉-3,5-二酮   、                                                                                      
(1R*,2R*)-12-oxa-3,4-diazatetracyclo[4.4.3.22,5.01,6]pentadeca-3,7,9-triene                                                                                                                                                                                              以
                                                                                         
二氯甲烷   、                                                                                         
丙酮                                                                                  为溶剂,
                                                                                                                                                                                        以70%的产率得到(5R,5aS,6R,9S,9aR,10S)-2-phenyl-6,7,8,9-tetrahydro-1H,5H,10H-6,9-epidiazeno-5,10-etheno-5a,9a-(methanooxymethano)[1,2,4]triazolo[1,2-b]phthalazine-1,3(2H)-dione