8(R)-(carboxymethyl)-2(R)-<1(S)-methyl-2-oxo-2-(1H-pyrrol-2-yl)ethyl>-3(R),5(R),9(R)-trimethyl-(6R)-1,7-dioxaspiro<5.5>undecane   、                                                                                      
Methyl 2-amino-3-hydroxy-4-N-trifluoroacetylaminobenzoate hydrochloride                                                                                                                                                              在
                                                                                                                                                                                 (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate   、                                                                                                  
三乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                    反应 4.0h,
                                                                                                                以62.5%的产率得到Methyl 3-hydroxy-4-N-trifluoroacetylamino-2-N-((3,9,11-trimethyl-8-(1-methyl-2-oxo-2-(1H-pyrrol-2-yl)-ethyl)-1,7-dioxaspiro<5.5>undec-2-yl)-acetyl)-anthranilate