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  • Title: Alstilobanines A-E, new indole alkaloids from Alstonia angustiloba.
    Author: Koyama K, Hirasawa Y, Zaima K, Hoe TC, Chan KL, Morita H.
    Journal: Bioorg Med Chem; 2008 Jul 01; 16(13):6483-8. PubMed ID: 18524603.
    Abstract:
    Five new alkaloids, alstilobanines A (1)-E (5) were isolated from Alstonia angustiloba (Apocynaceae) and their structures were determined by MS and 2D NMR spectral analysis. Alstilobanines A-E showed a moderate vasorelaxant activity against phenylephrine-induced contraction of isolated rat aorta.
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