Compound 8

3-(3-(1-((3S,6S,9S,12S,15R)-3-((1H-imidazol-4-yl)methyl)-6-((1H-indol-3-yl)methyl)-15-(((S)-1-(((S)-6-guanidino-2-oxohexan-3-yl)amino)-4-methyl-1-oxopentan-2-yl)carbamoyl)-12-(4-hydroxybenzyl)-9-(hydroxymethyl)-1,4,7,10,13,21-hexaoxo-1-((S)-5-oxopyrrolidin-2-yl)-24,27,30-trioxa-2,5,8,11,14,20-hexaazadotriacontan-32-yl)-1H-1,2,3-triazol-4-yl)propoxy)-5-(3-(3,5-dimethyl-1H-pyrazol-4-yl)propoxy)benzoic acid

From: A biomimetic approach for enhancing the in vivo half-life of peptides