| 摘要 |
(20) esters of camptothecin analogs are provided. The compounds are (20) esters of an aminoalkanoic acid or an imidoalkanoic acid and homocamptothecin, which is optionally substituted at the 7, 9, 10, 11, and 12 positions of the homocamptothecin ring. The compounds are useful for treating cancer.
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