1,6,11(2H)-Naphthacenetrione, 4-((6-deoxy-2-O-methyl-alpha-L-mannopyranosyl)oxy)-3,4-dihydro-2,5,7-trihydroxy-3,9-dimethoxy-2-methyl- (9CI) 1,6,11(2H)-Naphthacenetrione, 4-((6-deoxy-2-O-methyl-alpha-L-mannopyranosyl)oxy)-3,4-dihydro-3,4-dihydro-2,5,7-trihydroxy-3,9-dimethoxy-2-methyl- 11033-34-4 Antibiotic U 20661 BRN 1416500 Estefimicina [INN-Spanish] NSC 93419 Steffimycin Steffimycin [USAN:INN] Steffimycine [INN-French] Steffimycinum [INN-Latin] Steffisburgensimycin U 20661