(8S,10S)-8-Acetyl-6,8,11-trihydroxy-1-methoxy-10-((tetrahydro-2H-pyran-2-yl)oxy)-7,8,9,10-tetrahydrotetracene-5,12-dione is an impurity of Daunorubicin (D194500), a anthracycline antibiotic related to the rhodomycins and is known to exhibit antineoplastic properties.