Synonyms: STEFFIMYCIN B;1,6,11(2h)-naphthacenetrione,4-((6-deoxy-2,4-di-o-methyl-alpha-l-mannopyranosy;5,7-trihydroxy-3,9-dimethoxy-2-methyl-l)oxy)-4-dihydro-2;u40615;4-(2-O,4-O-Dimethyl-α-L-rhamnopyranosyloxy)-3,4-dihydro-2,5,7-trihydroxy-3,9-dimethoxy-2-methyl-1,6,11(2H)-naphthacenetrione;4-[(2-O,4-O-Dimethyl-6-deoxy-α-L-mannopyranosyl)oxy]-3,4-dihydro-2,5,7-trihydroxy-3,9-dimethoxy-2-methyl-1,6,11(2H)-naphthacenetrione;Steffimycin 4'-methyl ether;1,6,11(2H)-Naphthacenetrione, 4-((6-deoxy-2,4-di-o-methyl-alpha-L-mannopyranosyl)oxy)-3,4-dihydro-2,5,7-trihydroxy-3,9-dimethoxy-2-methyl-