5-(1H-indol-3-ylmethyl)imidazolidine-2,4-dione

N-叔丁氧羰基-L-色氨酸

2-氨基-3-((N-2,4,6-三甲基苯磺酰基)吲哚)丙酸

4-溴吲哚

(S)-methyl 3-(1H-indol-3-yl)-2-(p-toluenesulfonamido)propanoate