Doxorubicin-13C,d3 TFA is the deuterium and 13C labeled Doxorubicin. Doxorubicin (Hydroxydaunorubicin), a cytotoxic anthracycline antibiotic, is an anti-cancer chemotherapy agent. Doxorubicin inhibits topoisomerase II with an IC50 of 2.67 µM, thus stoppin