| Popis: |
Essential oils obtained by hydrodistillation from the leaves and flower spikes of Piper friedrich- sthalii from Costa Rica and Panama, and leaves of P. pseudolindenii from Costa Rica were analysed by GC-FID, GC- MS and 13 C-NMR. Monoterpenoids constituted the main fraction of the oils of P. friedrichsthalii from Costa Rica, particularly α-pinene, camphene, β-phellandrene, limonene and menthane derivatives, whereas the oils from leaves of P. friedrichsthalii from Panama and of P. pseudolindenii from Costa Rica were characterized by a high sesquiter- pene content, especially 11-selinen-4α-ol, α-selinene, germacrene D and β-selinene in the former, and β-elemene, β-caryophyllene, germacrene D and α-humulene in the latter. Copyright © 2003 John Wiley & Sons, Ltd. |
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