The essential oil of the leaves of Eugenia uniflora L. (Myrtaceae) was investigated by GLC, NMR, and mass spectrometry. Main constituents are furanodiene (27a), and the hitherto unknown selina-1,3,7(1 1)-trien-8-one (36) and oxidoselina-1 ,3,7(1 1)-trien-8-one (41). The oil contains almost no monoterpenes, but several known sesquiterpenes. The characteristic odor of the oil is determined by the mushroom-like, woody, and spicy smelling furanodiene (27a), and by the green and cucumber note of selinatrienone (36).

The essential oil of the leaves of Curcuma longa L. (Zingiberaceae) was investigated by GC, NMR and MS. Major constituents are a-phellandrene (47.7 %) and terpinolene (28.9 %). The oil is composed mainly of monoterpenes.

The essential oil of ARTEMISIA VESTITA (Compositae) was investigated by GLC, NMR, and mass spectrometry. Main constituents are alpha-, beta-, gamma-himachalene, caryophyllene, germacrene D, himachalol, allohimachalol, alpha-, gamma-atlantone, 1,8-cineole, yomogi alcohol, artemisia, and santolina alcohol and their acetates, and the thujones and thujanols. The characteristic oder of the oil is determined by the freshly smelling, 1, 8-cineole and thujone, and by the woody and sweet note of himachalol and atlantone.

nic SPirodiliydroruuranc 8-12 wurdcn durch Addition der jcwiligrn Alkinole an das Kcton 20 (+ 21 -25). Lindlar-Hydrier u n 3 I---26-30) und Cyclisicrung hcrgcstellt. -Die gesittigten Dcriviitc 1-6 warcn entwcdcr durch Hydricrung (8-10 -+ 1. 2.

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