Succinyl-(Glu9,Ala11·15)-Endothelin-1 (8-21)

L-Tryptophan,N-(3-carboxy-1-oxopropyl)-L-a-aspartyl-L-a-glutamyl-L-a-glutamyl-L-alanyl-L-valyl-L-tyrosyl-L-phenylalanyl-L-alanyl-L-histidyl-L-leucyl-L-a-aspartyl-L-isoleucyl-L-isoleucyl-