In rat, 5-Iminodaunorubicin (5-ID; 1-16 mg/kg) treatment produces widening of the QRS complex, increased R- and S-wave voltage, and prolonged the Q alpha T interval. And the quinone redox cycling is suppressed in 5-Iminodaunorubicin. 5-Iminodaunorubicin shows lower cardiotoxic[1].