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  • Title: New indole alkaloids from the bark of Alstonia scholaris.
    Author: Salim AA, Garson MJ, Craik DJ.
    Journal: J Nat Prod; 2004 Sep; 67(9):1591-4. PubMed ID: 15387668.
    Abstract:
    A new indole alkaloid, akuammiginone (1), and a new glycosidic indole alkaloid, echitamidine-N-oxide 19-O-beta-d-glucopyranoside (2), together with the five known alkaloids, echitaminic acid (3), echitamidine N-oxide (4), N(b)-demethylalstogustine N-oxide (5), akuammicine N-oxide (6), and N(b)-demethylalstogustine (7), were isolated from the trunk bark of Alstonia scholaris collected in Timor, Indonesia. The structures of all compounds were elucidated by spectroscopic methods. This is the first report of compounds 3-5and 7 in A. scholaris. Some NMR assignments of the known compounds were revised.
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