The novel C7-modified camptothecin analogs, and pharmaceutically-acceptable salts thereof, of the present invention: (i) possess potent antitumor activity (i.e., in nanomolar or subnanomolar concentrations) for inhibiting the growth of human and animal tumor cells in vitro; (ii) are potent inhibition of Topoisomerase I; (iii) lack of susceptibility to MDR/MRP drug resistance; (iv) require no metabolic drug activation: (v) lack glucuronidation of the A-ring or B-ring; (vi) reduce drug-binding affinity to plasma proteins; (vii) maintain lactone stability; (viii) maintain drug potency; and (ix) possess a low molecular weight (e.g., MW<600).
本发明的C7修饰的
喜树碱类似物及其药学上可接受的盐:(i)在纳摩尔或亚纳摩尔浓度下具有强效的抗肿瘤活性,可抑制体外人类和动物肿瘤细胞的生长;(ii)具有强效的拓扑异构酶I抑制作用;(iii)不易受到MDR/MRP药物抗性的影响;(iv)无需代谢药物激活;(v)缺乏A环或B环的
葡萄糖醛酸化;(vi)降低药物与血浆蛋白的结合亲和力;(vii)保持内酯稳定性;(viii)保持药物效力;(ix)分子量低(例如,MW<600)。