Phytochemical Studies On Resins Of Boswellia Neglecta And Commiphora Sphaerocarpa

The family Burseraceae with 17 genera is widely distributed in tropical and subtropicalrncountries. The genus COlllllliphora comprises 150-200 species and B05wellia 20 species. Gumrnexudates of some COlllllliphora and Boswellia species have been used for centuries as medicinal andrnperfumery substances. In the course of this study 7 COlllllliphora and 3 Boswellia species wererncollected and identified. Two of this species are endemic (B. pirottae and C. lIIonoica). The study onrnthe chemical constituents of two species (E. neglecta and C. sphaerocmpa) was undertaken. The resinrnof C. sphaerocmpa used as a traditional medicine by the local people is studied chemically for thernfirst time. The extract from the resin of B. neglecta yielded as a major component Bn-8 tentativelyrnidentified as 12-uresen-3-ol. The extract obtained from the resin of C. sphaerocarpa afforded fiverncompounds coded as Cs-4, Cs-S, Cs-6, Cs-9 and Cs-IO. Cs-6 was identified as the novel compoundrn6-hydroxy isofuranogermacrene (84). Other characterized compounds are Cs-9 (3-methoxy-IOmethylenefhranogermacra-rnI (2)-en-6-one (22) and Cs-IO (2-methoxyfuranogermacra-1 (lO)-en-6-onern(20) previously isolated from the resins of C. /110111101 and C. holrziana. Characterization of Cs-4 andrnCs-S is in progress.

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