The essential oils isolated from twigs of Juniperus cedrus Webb & Berth. grown on Madeira were analysed by GC, GC-MS and 13C-NMR. The oils consisted mainly of monoterpene hydrocarbons (53.1-87.8%), the main ones being alpha-pinene (19.6-55.3%), limonene (17.3-32.7%) and Delta-3-carene (5.5-15.7%). The sesquiterpenoid fraction (4.1-22.3%) was dominated by E-caryophyllene (1.6-7.4%), while sandaracopimaradiene (0...
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