Doxorubicin hydrochloride Imp. A (EP): (8S,10S)-8-acetyl-10-[(3-amino-2,3,6-trideoxy-a-l-lyxo-hexopyranosyl)oxy]-6,8,11-trihydroxy-1-methoxy-7,8,9,10-tetrahydrotetracene-5,12-dione (daunorubicin).