[4-(2,3,4,6-tetra-O-acetyl-α-D-mannopyranosyloxy)phenyl]acetic acid   、                                                                                      
N-[2-(2,3,4,6-tetra-O-acetyl-α-D-mannopyranosyloxy)ethyl]-S-(triphenylmethyl)-L-cysteinamide                                                                                                                                                              在
                                                                                                                                                                                 O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate   、                                                                                                  
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                                                        以60%的产率得到N-[4-(2,3,4,6-tetra-O-acetyl-α-D-mannopyranosyloxy)phenyl]acetyl-S-(triphenylmethyl)-L-cysteine [2-(2,3,4,6-tetra-O-acetyl-α-D-mannopyranosyloxy)ethyl]amide