Pharmaco-chemistry of Malaysian timber trees. XII. resveratrol oligomers from Neobalanocarpus heimii


Citation

Weber J. F. F., . and Ibtisam Abdul Wahab, . and Alini Marzuki, . and Thomas Noel F., . and Azizol Abdul Kadir, . and Khalijah Awang, . and Richomme Pascal, . (2004) Pharmaco-chemistry of Malaysian timber trees. XII. resveratrol oligomers from Neobalanocarpus heimii. [Proceedings Paper]

Abstract

Twelve resveratrol oligomers were isolated from the ethyl acetate extract of cengal Neobalanocarpus heimii Dipterocarpaceae by semi-preparative HPLC. In addition to the previously reported tetrameric species hopeaphenol 1 we isolated three tetramers vaticaphenol A 2 hemsleyanols C 3 and D 4 three trimers -copalliferol A vaticanol G 5 vaticanol A 6 and vaticanol E 7 and two dimers balanocarpol 8 and its diastereoisomer ampelopsin A 9. We also isolated three new compounds a dimer --heimiol A 10 its diastereoisomer heimiol B 11 and a trimer heimiol C 12. These structures were established by means of extensive two-dimensional NMR experiments i.e. COSY HMQC HMBC and NOESY.


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Abstract

Twelve resveratrol oligomers were isolated from the ethyl acetate extract of cengal Neobalanocarpus heimii Dipterocarpaceae by semi-preparative HPLC. In addition to the previously reported tetrameric species hopeaphenol 1 we isolated three tetramers vaticaphenol A 2 hemsleyanols C 3 and D 4 three trimers -copalliferol A vaticanol G 5 vaticanol A 6 and vaticanol E 7 and two dimers balanocarpol 8 and its diastereoisomer ampelopsin A 9. We also isolated three new compounds a dimer --heimiol A 10 its diastereoisomer heimiol B 11 and a trimer heimiol C 12. These structures were established by means of extensive two-dimensional NMR experiments i.e. COSY HMQC HMBC and NOESY.

Additional Metadata

[error in script]
Item Type: Proceedings Paper
Additional Information: 2 table
AGROVOC Term: TIMBER TREES
AGROVOC Term: DIPTEROCARPACEAE
AGROVOC Term: HEARTWOOD
AGROVOC Term: PURIFICATION
AGROVOC Term: AROMATIC COMPOUNDS
AGROVOC Term: BIOCHEMISTRY
AGROVOC Term: MALAYSIA
Geographical Term: MALAYSIA
Depositing User: Ms. Norfaezah Khomsan
Last Modified: 24 Apr 2025 05:26
URI: http://webagris.upm.edu.my/id/eprint/15514

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