Antitumor efficacy, toxicity and pharmacokinetics of 9-nitrocamptothecin: role of lactone ratio

Since the carboxylate form could be regarded as a possible “source” of lactone form, the optimum ratio of lactone should be determined for the administration of camptothecin (CPT) analogues such as 9-nitrocamptothecin (9-NC). 9-NC solutions with different lactone ratios (100, 75, 50, 25 and 0 %) were obtained by the change of pH. The resultant 9-NC solution… CONTINUE READING