ethyl (2-((S)-2-((S)-2-((S)-2-amino-4-methylpentanamido)-4-methylpentanamido)-3-(pyridin-3-yl)propanamido)-2-methylpropanoyl)-L-leucinate

Boc-L-Leu-Aib-OEt

20-benzyl 1-ethyl (2S,8S,11S,14S,17S)-17-amino-2,11,14-triisobutyl-5,5-dimethyl-4,7,10,13,16-pentaoxo-8-(pyridin-3-ylmethyl)-3,6,9,12,15-pentaazaicosanedioate

Boc-Leu-Aib-OH