3-(2-naphthyl)alanyl-cystinyl-tyrosyl-tryptophyl-lysyl-valyl-cystinyl-threonine amide
L-Threoninamide, 3-(1-naphthalenyl)-D-alanyl-L-cysteinyl-L-tyrosyl-D-tryptophyl-L-lysyl-L-valyl-L-cysteinyl-, cyclic (2-7)-disulfide