11016-61-8 4-27-00-09726 (Beilstein Handbook Reference) 512-64-1 BRN 0078671 ECHINOMYCIN NSC 526417 Quinomycin A Quinomycin A (9CI) S-426-S (Lepetit) SK 302B Stereoisomer of N,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)