7-methoxy-2-(thiophen-2-yl)-1H-benzo[d]imidazole-4-carboxylic acid   、                                                                                      
L-色氨酸甲酯                                                                                                                                                                                                                                                                                                          以to afford the desired product (65 mg, 13% yield) as a light yellow solid的产率得到(S)-methyl 2-[7-hydroxy-2-(thiophen-2-yl)-1H-benzo[d]imidazole-4-carboxamido]-3-(1H-indol-3-yl)propanoate