Furoquinoline Alkaloids and Cytotoxic Constituents from the Leaves ofMelicope semecarpifolia
- 1 June 2003
- journal article
- research article
- Published by Georg Thieme Verlag KG in Planta Medica
- Vol. 69 (6) , 542-546
- https://doi.org/10.1055/s-2003-40637
Abstract
Three new furoquinoline alkaloids, melicarpine, semecarpine, and (±)-8-methoxyplatydesmine, together with a known flavone, ayanin, were isolated from the leaves of Melicope semecarpifolia. The structures of the three alkaloids were determined through spectral analyses. Of the nineteen isolates obtained here and during earlier work, twelve exhibited cytotoxic activity against P-388, HT-29, or A549 cell lines in vitro. Among them, confusameline is the most cytotoxic isolate, and exhibited more potent cytotoxicity (ED50 value = 0.03 μg/mL) against the P-388 cell line than the reference compound mithramycin (ED50 value = 0.06 μg/mL).Keywords
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