H-D-PHE-CYS-TYR-D-TRP-ARG-THR-PEN-THR-NH2

D-Phe-L-Cys-L-Tyr-D-Trp-L-Arg-L-Thr-L-Pen-L-Thr-NH2

H-D-Phe-Cys-Tyr-D-Trp-Arg-Thr-Pen-Thr-NH2(Cys2-Pen7)

L-Threoninamide,D-phenylalanyl-L-cysteinyl-L-tyrosyl-D-tryptophyl-L-arginyl-L-threonyl-3-mercapto-L-valyl-,cyclic (2®