Aim: To investigate the pharmacokinetics and disposition of simmitecan (LP) that was a water-soluble ester prodrug of chimmitecan (L-2-Z) with potent anti-tumor activities in different experimental animals, and to assess its drug-drug interaction potential. Methods: SD rats were injected with a single iv bolus doses of LP (3.75, 7.5 and 15 mg/kg). The pharmacokinetics, tissue distribution, excretion and metabolism of LP and its active ...