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Two easily accessible, natural occurring triterpenoids, betulinic and ursolic acid, were used as starting materials for the synthesis of novel cytotoxic agents. A set of 28 ethylenediamine-spacered carboxamides was prepared holding an additional substituent connected to the ethylenediamine group. The compounds were screened in SRB assays to evaluate their cytotoxic activity employing several human tumor cell lines. Betulinic acid-derived carboxamides 17⁻30 showed significantly higher cytotoxicity than their ursolic acid analogs 3⁻16. In particular, compounds 25 and 26 were highly cytotoxic, as indicated by EC50 values lower than 1 μM.
Pubmed ID: 30297604
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Cell line A2780 is a Cancer cell line with a species of origin Homo sapiens (Human)
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