1-{(2S,3S)-2-[(R)-2-((S)-2-Amino-7-bromo-heptanoylamino)-3-(4-methoxy-phenyl)-propionylamino]-3-methyl-pentanoyl}-piperidine-2-carboxylic acid; compound with trifluoro-acetic acid 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成
cyclo(-L-Am7(Ac)-D-Tyr(Me)-L-Ile-D-Pip-)