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Sesquiterpenes from Cymbopogon proximus

Author(s): Hesham I. El-Askary | Meselhy R. Meselhy | Ahmed M. Galal

Journal: Molecules ISSN 1420-3049
Volume: 8; Issue: 9; Start page: 670; Date: 2003;
Original page

Keywords: Cymbopogon proximus | Gramineae | proximadiol | sesquiterpenes | NMR | MS

ABSTRACT
In addition to four previously reported compounds: proximadiol (1), 5α-hydroxy-β-eudesmol (2), 1β-hydroxy-β-eudesmol (4) and 1β-hydroxy-α-eudesmol (5), two new sesquiterpenes, 5α-hydroperoxy-β-eudesmol (3) and 7α,11-dihydroxycadin-10(14)-ene (6) were isolated from the unsaponifiable fraction of the petroleum ether extract of Cymbopogon proximus STAPF. Isolation of compounds 2, 4 and 5 from the genus Cymbopogon is reported for the first time. The structure elucidation of these compounds was based primarily on 1D and 2D-NMR analyses.