Chemical Composition of the Leaf, Stem and Root Oils of Pleiospermium alatum

摘要

The essential oils obtained by hydrodistillation of leaves, stem and roots of Pleiospermium alatum were analyzed by Gas Chromatography and Gas Chromatography - Mass Spectrometry. Thirty-one components comprising 97.3% of the leaf oil, twenty-nine components comprising 96.1% of the stem oil and twenty-three components comprising 95.0% of the root oil were identified. The major components in the leaf oil were elemol (12.5%) followed by pregei-jerene (10.5%), α-cadinol (8.5%) and geijerene (8.5%). The stem oil contained elemol (12.4%), oc-cadinol (11.1%) and epi-α-muurolol (9.4%) as the major components, while the root oil had oc-cadinol (27.9%), α-bisabolol (11.5%), α-santalene (11.0%) and elemol (9.8 %) as the major components.