Doxorubicin Dimer Impurity 3

(R,S,S,S,8S,8’S,10S,10’S)-8,8′-(4-hydroxy-2-(hydroxymethyl)-1,3-dioxolane-2,4-diyl)bis(10-(((2R,4S,5S,6S)-4-amino-5-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-6,8,11-trihydroxy-1-methoxy-7,8,9,10-tetrahydrotetracene-5,12-dione)