Cytotoxic Cucurbitane-Type Triterpenoids from Elaeocarpus hainanensis

Abstract

Bioassay-guided fractionation of the crude extract of Elaeocarpus hainanensis (Elaeocarpaceae), using the proliferation of non-small cell lung cancer A549/ATCC and human hepatocellular carcinoma BEL-7402 cells as a monitor, led to the isolation of ten cucurbitane-type triterpenoids, including three new compounds (1 – 3) and seven known compounds (4 – 10). Their structures were determined on the basis of spectroscopic analyses, chemical methods, and comparison with spectroscopic data in literature. The two known compounds, cucurbitacins D (5) and I (10) were found to exhibit the strongest cytotoxicity against A549/ATCC and BEL-7402 cells in vitro with IC₅₀ values of less than 1 μM.

Elaeocarpus hainanensis - Elaeocarpaceae - cucurbitane - triterpenoids - cytotoxicity

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