(2R,5S)-3,6-diethoxy-2-isopropyl-5-[3-(trimethylsilyl)prop-2-ynyl]2,5-diydropyrazine

2-acetamido-3-(1H-indol-3-yl)prop-2-enoic acid

N-苄氧羰基-L-色氨酸

Nα-Boc-N1-甲酰-L-色氨酸

2-氨基-3-(1H-吲哚-3-基)-丙酰胺