the drugs , doxorubicin ( dx ) , 4-epi-doxorubicin ( 4'edx ) , 4-demethoxy-daunorubicin ( 4dmdr ) and 4'-deoxy-doxorubicin ( 4'dxdx ) were infused for 40 min at a concentration of 26 microm into the isolated hearts .
C0011015
daunorubicin
C0020789
4dmdr