Cbz-L-Phe-L-Leu-NH2

(3S,6R,9S,12S,15R,20aS)-3,15-dibenzyl-6,12-diisobutyl-9-isopropyltetradecahydropyrrolo[1,2-a][1,4,7,10,13,16]hexaazacyclooctadecine-1,4,7,10,13,16-hexaone

cyclo-(Pro-Leu-Ile-Phe-Ser-Pro-Ile)

Nα-leucyl[8-lysine]vasopressin