(S)-3-((S)-4-amino-2-((S)-2-decanamido-3-(1H-indol-3-yl)propanamido)-4-oxobutanamido)-4-(((2S,3R)-1-((2-amino-2-oxoethyl)amino)-3-hydroxy-1-oxobutan-2-yl)amino)-4-oxobutanoic acid