Phytochemical Investigation Of The Resins Of Boswellia Species Collected From Kebtele Area In Agew-awi (gojjam)

The genus Boswellia is one of the 17 genera belonging to Bureseraceaernfamily. In the course of this study leaves and barks of Boswellia speciesrnand its resins were collected from Kebtele area for botanical identificationrnand chemical analysis. The species was identified by Dr. Kaj Vollesenrn(Kew Royal Botanical Garden, U.K.) as Boswellia papyrifera.rnThe essential oils of the resins from Boswellia sp. (Kebtele) and B.rnpapyrifera (obtained from Markato) were isolated by hydrodistillation andrnsome of the components identified by GC. The major componentsrnBoswellia sp. (Kebtele) were verticilla-4(20),7,11-triene (BK1) (65%),rnoctylacetate (4%) and other four unknown components whoserncompositions of the oil near to 4 %. This analysis gave a different resultrncompared to the report of Dekebo et al. [26], Hamm et al. [9] and B.rnpapyrifera (obtained from Markato) with octyl acetate (≥56 %) and noctanolrn(≥5 %) as their common major components and verticilla-rn4(20),7,11-triene was absent in any of the three. Basar et al. (2001)[34]rnisolated and identified verticilla-4(20),7,11-triene the first time in thernessential oil of B. carteri (6% of the oil).In this work it was also possible to isolate three compounds from the petrolrnextract of the resins: verticilla-4(20),7,11-triene, partially characterized diterpenern(BK3) and uncharacterized white crystalline solid (BK6).

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