Strychnos 1990 - 2004 - Crops for the Future
Strychnos 1990 - 2004 - Crops for the Future
Strychnos 1990 - 2004 - Crops for the Future
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Author<br />
Title<br />
Year<br />
Source title<br />
Reference<br />
Liu, H. M., J. Orjala, O. Sticher and T. Rali<br />
Acylated flavonol glycosides from leaves of Stenochlaena palustris<br />
1999<br />
Journal of Natural Products<br />
62(1): 70-75<br />
Abstract<br />
From <strong>the</strong> leaves of Stenochlaena palustris five new O-acylated flavonol glycosides,<br />
stenopalustrosides A-E (1-5), have been isolated along with five known compounds, kaempferol 3-O-<br />
(3"-O-E-p-coumaroyl)-(6"-O-E-feruloyl)-beta-D-glucopyranoside (6), kaempferol 3-O-(3",6"-di-O-Ep-coumaroyl)-beta-D-glucopyranoside<br />
(7), kaempferol 3-O-(3"-O-E-p-coumaroyl)-beta-Dglucopyranoside<br />
(8), kaempferol 3-O-(6"-O-E-p-coumaroyl)-beta-D-glucopyranoside(9); and<br />
kaempferol 3-O-beta-D-glucopyranoside (10). The structures of <strong>the</strong> isolates were elucidated by<br />
spectroscopic methods, mainly 1D and 2D NMR. Compounds 1-4 showed significant antibacterial<br />
activities against Gram-positive strains. The structural difference between <strong>the</strong> isolated antibacterial<br />
a n d n o n a n t i b a c t e r i a l c o m p o u n d s i s d i s c u s s e d .<br />
Author<br />
Title<br />
Year<br />
Source title<br />
Reference<br />
Martin, M. T., P. Rasoanaivo, G. Palazzino, C. Galeffi, M. Nicoletti, F. Trigalo an<br />
Minor n-b,c(21)-secocuran alkaloids of <strong>Strychnos</strong> myrtoides<br />
1999<br />
Phytochemistry<br />
51(3): 479-486<br />
Abstract<br />
From <strong>the</strong> stem bark of <strong>Strychnos</strong> myrtoides in addition to strychnobrasiline and malagashanine, four<br />
minor alkaloids, viz. malagashanol, 12-hydroxy-19-epi-malagashanine, myrtoidine and 11-<br />
demethoxymyrtoidine were isolated and <strong>the</strong>ir structures were established by 2-D NMR techniques.<br />
They belong to <strong>the</strong> series N-b,C(21)-secocuran and <strong>the</strong> two last show an additional alpha-beta<br />
unsaturated gamma-lactonic ring among C(18)-C(21). The biogenesis of <strong>the</strong>se alkaloids is also<br />
discussed. (C) 1999 Elsevier Science Ltd. All rights reserved.