7-[9-(4-hydroxy-5-hydroxymethyl-tetrahydrofuran-2-yl)-1,9-dihydro-purin-6-ylideneamino]-6H-benzo[f][1,3]dioxolo[4',5':4,5]benzo[1,2,3-cd]indol-5-one   、                                                                                      
4,4'-双甲氧基三苯甲基氯                                                                                                                                                              在
                                                                                                                                                                                 
吡啶                                                                                                                                  作用下,
                                                                                                                                                                                        反应 3.0h,
                                                                                                                以66%的产率得到7-(9-{5-[bis-(4-methoxyphenyl)-phenylmethoxymethyl]-4-hydroxytetrahydrofuran-2-yl}-1,9-dihydropurin-6-ylideneamino)-6H-benzo[f][1,3]dioxolo[4',5':4,5]benzo[1,2,3-cd]indol-5-one