3-(3-chlorophenylethynyl)-7-carbamoyl-1-oxa-2,7-diazaspiro[4.4]non-2-ene   、                                                                                      
3-(3-chlorophenylethynyl)-1-oxa-2,7-diazaspiro[4.4]non-2-ene                                                                                                                                                              在
                                                                                                                                                                                 2-[2-(3-Chlorophenyl)ethynyl]-4-oxa-3,8-diazaspiro[4.5]dec-2-ene-8-carboxamide   、                                                                                                  Petroleum Ether-EtOAc                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 2-[2-(3-Chlorophenyl)ethynyl]-4-oxa-3,8-diazaspiro[4.5]dec-2-ene-8-carboxamide