Chemical Composition of the Leaf Oil of Psiadia altissima (Compositeae)

ABSTRACT Fresh leaves of Psiadia altissima (DC) Benth. et Hook, from Madagascar were steam distilled to produce an oil in 0.5% yield. Fifty-two compounds of the oil were characterized using GC/MS and retention indices. The hydrocarbon fraction (83%) was composed of monoterpenes and sesquiterpenes, among which β-pinene (39.7%) was the main component of this oil. Of the 25 sesquiterpenoids detected, 14 have been identified, such as T-muurolol and β-eudesmol (2.2%) and δ-cadinol (1.2%)