The essential oils of Astrodaucus orientalis (L.) Drude leaves and seeds growing wild in Iran were examined by GC and GC-MS. The composition of the seed oil sample was compared with that of the leaf oil. Twenty-six compounds were identified in both the leaf and the seed oil. Although the composition of the seed oil was similar to that of the leaf oil, quantitative differences in concentration of some constituents were observed. The major components of the leaf oil were fenchyl acetate (44.5%) and α-pinene (21.6%) but the major constituents of the seed oil were myrcene (47.7%) and β-pinene (21.8%). The seed oil was found to contain lower amounts of bornyl acetate, germacrene D and δ-cadinene than the leaf oil.

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The essential oil was isolated by steam distillation from the aerial parts of Cleome iberica DC. at a yield of 0.1% w/w, based on dry weight. The oil was analysed by a combination of GC and GC-MS; 26 components were identified, constituting 99.8% of the oil. The main constituents of the essential oil were carotol (21.8%), germacrene D (15.8%), β β β β β-cubebene (15.5%), trans-nerolidol (5.6%), δ δ δ δ δ-cadinene (4.5%) and hexyl acetate (4.0%).

The oil constituents from rhizomes, leaves and seed of Peucedanum petiolare (DC.) Boiss., gathered in Touchal on mountain Alborz (Tehran province) in Iran, have been studied by GC and GC/MS. The major constituents in the rhizome oil were found to be b-bisabolene (31.3%), (E)-sesquilavandulol (20.5%), geranyl acetate (5.7%), citronellyl acetate (5.2%) and sabinene (5.2%). In the leaf oil the main components found were sabinene (42.3%), a-pinene (42.6%) and limonene (2.6%). In the seed α α α α α-pinene (47.3%) and sabinene (45.9%) were the predominant constituents. Copyright

Hydro-distilled volatile oil from the aerial parts of Rubia tinctorum L. was obtained at yield of 0.1% w/ w based on dry weight. The oil was analyzed by a combination of GC and GC-MS. Thirty-four components were identified, constituting 96.4% of the oil. The major constituents in the oil were pentadecanal (20.2%), tridecanal (16.7%) and globulol (7.8%).