Chemical composition of oleo-gum-resin from Ferula gummosa |
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Authors: | Hossein T. Jalali Zahra J. Ebrahimian Dmitry V. Evtuguin Carlos Pascoal Neto |
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Affiliation: | a Department of Wood and Paper, University of Tehran, 31585-4313 Tehran, Iran b CICECO and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal c Islamic Azad University, Amol Branch, 46351-43358, Amol, Iran |
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Abstract: | The chemical composition of oleo-gum-resin from Ferula gummosa collected in the northern part of Iran has been studied. The fraction of oleo-gum-resin soluble in ethanol (ca 67 wt.%) is composed by three major fractions: (i) monoterpenes and monoterpenoids (ca 15 wt.% fraction), (ii) sesquiterpenes and sesquiterpenoids (ca 30 wt.%) and (iii) triterpenes and triterpenoids (ca 55 wt.%). The major families of terpenes and terpenoids were identified employing gas chromatography coupled with mass spectrometry detector (GC-MS). Almost 25 wt.% of oleo-gum-resin was insoluble in ethanol and, according to wet chemistry analyses, assigned to arabinogalactane structurally associated with protein complex (AGP). This arabinogalactan possessed the molecular weight of ca 30 kDa, as revealed by size exclusion chromatography, and the main backbone was constituted by β-(1 → 3)/β-(1 → 3,6)-linked d-galactopyranosyl residues ramified predominantly by terminal α-l-arabinofuranosyl and β-d-glucuronopyranosyl residues, as assessed by 1D/2D 1H NMR. |
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Keywords: | Arabinogalactan Ferula gummosa Oleo-gum-resin Terpene Terpenoid |
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