Doxorubicin Impurity 1 Catalogue D335731 CAS 69429-21-6 (HCl:58199-96-5) M.W 529.50 M.F C26H27NO11 Specifications FAQs (2S,4S)-4-(((2R,4S,5S,6S)-4-amino-5-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2,5,12-trihydroxy-7-methoxy-6,11-dioxo-1,2,3,4,6,11-hexahydrotetracene-2-carboxylic acid