(1E,4Z,6E)-5-hydroxy-1,7-bis(4-hydroxy-3-methoxyphenyl)-4-(prop-2-ynyl)hepta-1,4,6-trien-3-one   、                                                                                      (1'S,2R,2'S,4'S,5R,7'S,8'R,9'S,12'S,13'R,16'S)-5,7',9',13'-tetramethyl-5'-oxaspiro[oxane-2,6'-pentacyclo[10.8.0.0
2,9.0
4,8.0
13,18]icosan]-18'-en-16'-yl 3-(2-[2-(2-azidoethoxy)ethoxy]ethylcarbamoyl)propanoate                                                                                                                                                              在
                                                                                                                                                                                 
copper(II) sulfate   、                                                                                                  
sodium ascorbate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃   、                                                                                         
水                                                                                  为溶剂,
                                                                                                                                                    反应 24.0h,
                                                                                                                以40%的产率得到(1'S,2R,2'S,4'S,5R,7'S,8'R,9'S,12'S,13'R,16'S)-5,7',9',13'-tetramethyl-5'-oxaspiro[oxane-2,6'-pentacyclo[10.8.0.0
2,
9.0
4,
8.0
13,
18]icosan]-18'-en-16'-yl 3-(2-[2-(2-(4-[(2Z,4E)-2-[(2E)-1-hydroxy-3-(4-hydroxy-3-methoxyphenyl)prop-2-en-1-ylidene]-5-(4-hydroxy-3-methoxyphenyl)-3-oxopent-4-en-1-yl]-1H-1,2,3-triazol-1-yl)ethoxy)ethoxy]ethylcarbamoyl)propanoate