Synonyms: Echinomycin(8CI);9,22-Dioxa-28-thia-2,5,12,15,18,25-hexaazabicyclo[12.12.3]nonacosane,cyclic peptide deriv.;Antibiotic A 654I;NSC 13502;NSC 526417;SK 302B;Stereoisomer ofN,N'-[2,4,12,15,17,25-hexamethyl-11,24-bis(1-methylethyl)-27-(methylthio)-3,6,10,13,16,19,23,26-octaoxo-9,22-dioxa-28-thia-2,5,12,15,18,25-hexaazabicyclo[12.12.3]nonacosane-7,20-diyl]bis[2-quinoxalinecarboxamide];