Aucoumea klaineana Pierre syn. Dacryodes klaineana (Pierre) H.J.Lam. - Bourseraceae - okoumé, **Okoumé**, Gabun-Mahagoni

Large evergreen tree, up to 50m high; native to west and central Africa (Gabon, Cameroon, Congo); all plant parts highly fragrant.

Steam distillation of the oleo resin yielded 5% of a volatile oil with p-cymene (30.2%), α-pinene (20.6%), α-phellandrene (11.2%), limonene (5.4%), α-terpineol (5.4%), terpinen-4-ol (5.2%), and camphor (0.6%). \\
[Guang-Yi, Liang, et al. "The Volatile Oil of the Oleo Resin of Aucoumea klaineana Collected in Gabon1." Planta medica 54.04 (1988): 368-369]

| {{:alpha_pinene.jpg| α-pinene }} \\ α-pinene| {{:alpha_phellandrene.jpg| α-phellandrene }} \\ α-phellandrene | {{:limonene.jpg| limonene }} \\ limonene | {{:terpineol_alpha.jpg| α-terpineol}} \\ α-terpineol | {{:caryophylleneoxide.jpg| caryophyllene oxide}} \\ caryophyllene oxide | {{caryophylladien5alphaol.jpg|caryophylla-2(12),6-dien-5alpha-ol}} \\ caryophylla-2(12),6-dien-5α-ol |

Especially the twigs develope a "refreshing, terpenic, citrus-related (so-called 'hesperidic'), green, and transparent woody scent" when touched. Main components of the scent are α-pinene (11.0%), α-phellandrene (34.0%), limonene (21.0%), and (E)-β-ocimene (10.9%), accompanied by oxygen-containing derivatives contributing hesperidic and terpenic-resinous notes. Characteristic woody notes are contributed by caryophyllene oxide (0.25%) and caryophyllenols, especially caryophylla-2(12),6-dien-5α-ol (0.08%). \\ 
"All these derivatives are also of great importance to the wood scent of okoumé." \\
[Meaningful Scents around the World, Roman Kaiser, Zürich 2006, 90-91 and 217] 

Main components of the steam-distilled essential oils of Aucoumea klaineana resin from Cameroon were α-pinene (29.3%), α-phellandrene (30.9%), eucalyptol (9.0%), α-terpineol (3.1%), and terpinen-4-ol (2.5%). \\
[Dongmo, Pierre Michel Jazet, et al. "Chemical characterization, antiradical, antioxidant and anti-inflammatory potential of the essential oils of Canarium schweinfurthii and Aucoumea klaineana (Burseraceae) growing in Cameroon." Agriculture and Biology Journal of North America 1.4 (2010): 606-611] [[http://www.scihub.org/ABJNA/PDF/2010/4/1-4-606-611.pdf]]

The synthetic 'amber/woody/musk' [[http://http://www.thegoodscentscompany.com/data/rw1131071.html|okoumal]] (woody dioxolane; CAS 131812-67-4) is named after the famous Aucoumea klaineana wood which it resembles in smell. \\
[P.Kraft, lecture "Riechstoffe", Universität Göttingen 2022]


{{aucoumea_bidault.jpg}} \\
Flowering twig of Aucoumea klaineana [[https://tropical.theferns.info/viewtropical.php?id=Aucoumea+klaineana|Useful Tropical Plants]] Author: Ehoarn Bidault 
[[https://creativecommons.org/licenses/by-sa/3.0/de/|CC BY-SA 3.0]]