L-Threoninamide, L-cysteinyl-L-arginyl-L-seryl-L-serylglycyl-L-seryl-trans-4-hydroxy-L-prolyl-L-cysteinylglycyl-L-valyl-L-threonyl-L-seryl-L-isoleucyl-L-cysteinyl-L-cysteinylglycyl-L-arginyl-L-cysteinyl-L-tyrosyl-L-arginylglycyl-L-lysyl-L-cysteinyl-