amrubicin [ (7S,9S)-9-acetyl-9-amino-7-((2-deoxy-beta-D-erythro-pentopyranosyl)oxy)-7,8,9,10-tetrahydro-6,11-dihydroxy-5,12-naphthacenedione hydrochloride,SM 5887,SM-5887,amrubicin hydrochloride ] structure in first source; a 9-amino-anthracycline antibiotic