(5S,8S, 10aR)-N-benzhydryl-5-((S)-2-(methylamino)propanamido)-3-(3-methylbutanoyl)-6-oxodecahydropyrrolo[1,2-a][1,5] diazocine-8-carboxyamide
(5s,8s, 10ar)-n-benzhydryl-5-((s)-2-(methylamino)propanamido)-3-(3-methylbutanoyl)-6-oxodecahydropyrrolo[1,2-a][1,5] diazocine-8-carboxyamide