Analysis by gas chromatography–mass spectrometry of the essential oil from the aerial parts of Pimpinella junoniae Ceb. & Ort., gathered in La Gomera, Canary Islands, Spain

The essential oil from the aerial parts of Pimpinella junoniae Ceb. & Ort., growing in La Gomera, Canary Islands, Spain, was studied by gas chromatography and gas chromatography–mass spectrometry, and 43 constituents were identified. The major components were found to be α-zingiberene (20.6%), α-pinene (17.9%), (E)-β-farnesene (9.3%), ar-curcumene (7.4%), β-phellandrene (7.0%), β-bisabolene (6.1%) and epoxypseudoisoeugenyl 2-methylbutyrate (6.0%). The decomposition product of epoxypseudoisoeugenol derivatives, 5-methoxy-2-methylbenzofuran (5.7%), moderate amounts of other arylpropanoids with the pseudoisoeugenol skeleton (total percentage, 5.2%) and other compounds such as β-sesquiphellandrene (3.0%), cis-β-guaiene (1.5%), α-phellandrene (1.5%) and α-bisabolol (1.3%), were also found.