Lysine, cysteinylarginylglutaminylcysteinylcysteinylphenylalanylphenylalanylglycylprolyl-3-aminoalanyl-3-mercapto-2-aminobutanoylphenylalanylvalylcysteinyl-3-hydroxy-alpha-aspartylglycylasparaginyl-3-mercapto-2-aminobutanoyl-, cyclic (1-18),(4-14), (5-11)-tris(sulfide), cyclic (10-19)-imine