(4-{1-[2-(4-Amino-3-iodo-phenyl)-ethyl]-2,6-dioxo-3-propyl-2,3,6,9-tetrahydro-1H-purin-8-yl}-phenoxy)-acetic acid                                                                                                                                                              在
                                                                                                                                                                                 sodium azide   、                                                                                                  
溶剂黄146   、                                                                                                  sodium nitrite                                                                                                                                  作用下,
                                                                                                                                                                                                                            以56%的产率得到(4-{1-[2-(4-Azido-3-iodo-phenyl)-ethyl]-2,6-dioxo-3-propyl-2,3,6,9-tetrahydro-1H-purin-8-yl}-phenoxy)-acetic acid