SteffisburgensimycinAntibiotic U 20661NSC934194-(4,5-dihydroxy-3-methoxy-6-methyloxan-2-yl)oxy-2,5,7-trihydroxy-3,9-dimethoxy-2-methyl-3,4-dihydrotetracene-1,6,11-trioneU 20661Streptomyces steffisburgensis var. steffisburgerensis sp.n. antibioticSteffimycin(USANSteffisburgensimycin*Steffimycin (USAN/INN)CHEMBL29627SCHEMBL25015223SCHEMBL29846192