2-chloro-5-chloroethylpyridine hydrochloride   、                                                                                      3,4-dihydro-6-methanesulfonamidospiro[(2H)-1-benzopyran-2,4'-piperidine]-4-one hydrochloride                                                                                                                                                                                                                                                                                                          生成                                                 
6-Methanesulfonamido-3,4-dihydro-1'-[2-(2-chloropyrid-5-yl)ethyl]-spiro[(2H)-1-benzopyran-2,4'-piperidine]-4-one