glycine, glycyl-L-arginyl-L-valyl-L-tyrosylglycyl-L-histidyl-L-prolyl-L-phenylalanylglycyl-; Glycyl-L-arginyl-L-valyl-L-tyrosylglycyl-L-histidyl-L-prolyl-L-phenylalanylglycylglycine; glycyl-N~5~-(diaminomethylidene)-L-ornithyl-L-valyl-L-tyrosylglycyl-L-histidyl-L-prolyl-L-phenylalanylglycylglycine