(S)-N-((6S,9R,12S,15S)-12-((1H-咪唑-5-基)甲基)-1-氨基-6-((S)-1-氨基-3-(1H-吲哚-3-基)-1-氧代丙烷-2-基)氨甲酰基)-9-苄基-1-亚氨基-8,11,14-三氧代-2,7,10,13-四氮杂十六烷-15-基)-2-乙酰胺乙酸盐