N-5-fluorescein-N'-6-maleimidohexanoyl-Lys-OH   、                                                                                      
N-6-fluorescein-N'-6-maleimidohexanoyl-Lys-OH   、                                                                                      amino-PEG12-propionic acid 2-(CoA-S-succinimido)ethylamide                                                                                                                                                              在
                                                                                                                                                                                 benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate   、                                                                                                  
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 N'-6-fluorescein-N"-6-maleimidohexanoyl-Lys-amido-PEG12-propionic acid 2-(CoA-S-succinimido)ethylamide   、                                                                                             N'-5-fluorescein-N"-6-maleimidohexanoyl-Lys-amido-PEG12-propionic acid 2-(CoA-S-succinimido)ethylamide