Synonyms: 1,2-Dithia-5,8,11,14,17,20-hexaazacyclotricosane,cyclic peptide deriv.; L-Cysteine, L-phenylalanyl-L-leucylglycylglycyl-L-leucyl-L-isoleucyl-L-lysyl-L-isoleucyl-L-valyl-L-prolyl-L-alanyl-L-methionyl-L-isoleucyl-L-cysteinyl-L-alanyl-L-valyl-L-threonyl-L-lysyl-L-lysyl-,cyclic (14®20)-disulfide