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Monoterpenoid Indole Alkaloids from Alstonia mairei

✍ Scribed by Xiang-Hai Cai; Chun-Xia Zeng; Tao Feng; Yan Li; Xiao-Dong Luo


Publisher
John Wiley and Sons
Year
2010
Tongue
German
Weight
193 KB
Volume
93
Category
Article
ISSN
0018-019X

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✦ Synopsis


Three new monoterpenoid indole alkaloids, (14a,15a)-14,15-epoxyaspidofractinine (1) and maireines A and B (2 and 3, resp.), together with 19 known alkaloids, were isolated from the leaves and twigs of Alstonia mairei. The structures of the new compounds were elucidated by 1D-and 2D-NMR spectroscopic methods in combination with MS experiments.


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Indole Alkaloids from the Leaves of Alstonia villosa in Sunbawa (Alstonia 6). -From the MeOH extract of the title leaves among seventeen alkaloids seven novel ones such as (I)-(III) are isolated. The structure of (III) is determined by X-ray analysis.