Abstract
A number of costunolide derivatives ( 4a– p) have been synthesized and evaluated for their in vitro cytotoxicity against eight tumor and a non-tumor cell lines. Compound 4d showed around 2-fold better cytotoxicity against SW-620 (colon) cell line with improved safety index than costunolide ( 1). While compounds 4e, 4g, and 4p have shown around 2- to 3-fold better cytotoxicity against MIAPaCa2 (pancreas), K-562 (leukemia) and PA-1 (ovary) cell lines as well as better safety index in comparison to costunolide ( 1). Compound 4p also exhibited cytotoxicity against HBL100 (breast) cell line with 2-fold better safety index. Structure–activity relationship has been described.
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