CAS No 146897-68-9 , L-Phenylalanine,L-phenylalanyl-L-lysyl-L-cysteinyl-L-arginyl-L-arginyl-L-tryptophyl-L-glutaminyl-L-tryptophyl-L-arginyl-L-methionyl-L-lysyl-L-lysyl-L-leucylglycyl-L-alanyl-L-prolyl-L-seryl-L-isoleucyl-L-threonyl-L-cysteinyl-L-valyl-L-arginyl-L-arginyl-L-alanyl-,cyclic (3®