Somatulin

Nal-cyclo(Cys-Tyr-Trp-Lys-Val-Cys)-Thr-nh2

L-Threoninamide, 3-(2-naphthalenyl)-D-alanyl-L-cysteinyl-L-tyrosyl-D-tryptophyl-L-lysyl-L-valyl-L-cysteinyl-, cyclic (2-7)-disulfide