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Volatile components of Pimpinella tragium Viii. from Iran

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Volatile components of three parts of Pimpinella tragium ViiI. (Umbelliferae fam ily) from Iran were investigated qualitatively and quantitatively for the first time. Essential oils were isolated by hydro-distillation from stems plus leaves , inflorescence and seed s of P tragium individually. The plant materials were coll ected from Polour (Northeas t of Tehran Province). The yie lds of the stems plus leaves, inflorescence and seed oils were 0.08%, 0.37% and 1.33%w/w, respecti vely. Eighteen constituents in the stems plus leaves oil, twentysix constituents in the inflo rescence oil and twenty-three constituents in the seed oil were identifi ed. Major constituents of the stems plus leaves oil were: germ acrene D (34.7% ), germ acrene B (18.3%), born yl acetate (15 .8%), p-caryophyllene (5.6%) and p-pinene (4.5%). Major constituents of the inflorescence oil were: p-pinene (23.8%), germ acrene B (14.1%), hexadecanol (10.3 %), ~-caryophyllene (7.3%), germacrene D (6.2%) and bornyl acetate (4.1%)_ Main components of the seed oil were : p-pin ene (25 .3%), germ acrene B ( 17.8%), sab inene ( 13.6%), p-caryophyllene (4.8%) and hexadecanol (4 .7%).

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