2,5-dihydro-3-[2-(tert-butyloxycarbonyl)-1H-indol-3-yl]-4-[1-(2-deoxy-3,4-di-O-acetyl-L-rhamnopyranosyl)-1H-indol-3-yl]-1H-pyrrole-2,5-dione                                                                                                                                                              在
                                                                                                                                                                                 
甲酸                                                                                                                                  作用下,
                                                                                                                                                                                        反应 6.0h,
                                                                                                                以170 mg的产率得到2,5-dihydro-3-(1H-indol-3-yl)-4-[1-(2-deoxy-3,4-di-O-acetyl-β-L-rhamnopyranosyl)-1H-indol-3-yl]-1H-pyrrole-2,5-dione