Abstract
Four new alkaloids, hippobrines A-D (1-4), along with three new polyacetylenes, hippobrenes A-C (5-7), were isolated from Hippobroma longiflora. Compounds 1-3 possess an unprecedented carbon skeleton. All of the new structures were determined by analyzing their mass and NMR spectroscopic data. The absolute configurations of 1 and 2 were confirmed by single-crystal X-ray analyses, and the absolute configurations of 3 and 7 were deduced using their ECD spectra. Plausible biogenetic pathways of 1 and 4 were proposed. In regard to bioactivities, all compounds (1-7) exhibited weak antiangiogenic activity against human endothelial progenitor cells, with IC50 values ranging from 21.1 ± 1.1 to 44.0 ± 2.3 μg/mL.
Original language | English |
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Pages (from-to) | 719-729 |
Number of pages | 11 |
Journal | Journal of Natural Products |
Volume | 86 |
Issue number | 4 |
DOIs | |
State | Published - 28 04 2023 |
Bibliographical note
Publisher Copyright:© 2023 American Chemical Society and American Society of Pharmacognosy.