The Leaf Essential Oil of Eugenia reinwardtiana Growing in Australia

Author:

Brophy Joseph J.1,Clarkson John R.2,Deseo Myrna A.3,Ford Andrew J.4,Lawes Douglas J.5,Leach David N.6

Affiliation:

1. School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia

2. Queensland Parks and Wildlife Service PO Box 156 Mareeba, Qld 4880, Australia

3. Southern Cross Plant Science, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia; Present Address: Biosciences Research, Department of Economic Development, Jobs, Transport and Resources, 5 Ring Road, Bundoora, VIC 3083, Australia

4. CSIRO Land and Water Flagship, Tropical Forest Research Centre, PO Box 780, Atherton, Qld 4883 Australia

5. Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052, Australia

6. Southern Cross Plant Science, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia; Present Address: University of Western Sydney, Faculty of Health and Science, Locked Bag 1797, Penrith 2751, NSW, Australia

Abstract

The leaf essential oils of the two chemotypes of Eugenia reinwardtiana (Blume) DC growing in Australia have been investigated. Chemotype 1, isolated in 0.2% yield, w/w, dry weight, contained major amounts of α-pinene (10-26%), limonene (1–15%), β-caryophyllene (0.7–11%), α-humulene (0.9–16%) and bicyclogermacrene (1–23%). The second chemotype, found only on coastal dunes SW of Lockerbie Qld, and isolated in 0.4–0.6% (w/w, dry weight), contained α-pinene (tr −8.5%) β-caryophyllene (12–27%) and α-humulene (1–17%) as the major terpenes. This chemotype also contained the novel aliphatic diketone, 2-butyl-2,4,4-trimethyl-5-methoxycyclohex-5-en-1,3-dione (18–33%), whose structure determination is reported herein.

Publisher

SAGE Publications

Subject

Complementary and alternative medicine,Plant Science,Drug Discovery,Pharmacology,General Medicine

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