Nasser A. Awadh Ali, Stefania Zanetti, Bruno Marongiu, , Alessandra Piras, Silvia Porcedda, Danilo Falconieri, Paola Molicotti, Essential oil composition of leaves of Stachys yemenensis obtained by supercritical CO2 . Natural Product Research: Formerly Natural Product Letters Volume 24, Issue 19, 2010
This article reports the composition of the essential oil from the leaves of Stachys yemenensis. The essential oil was extracted by supercritical CO2 (90 bar;
L. Quassinti, G. Lupidi, F. Maggi, G. Sagratini, F. Papa, S. Vittori, A. Bianco, M. Bramucci. Antioxidant and antiproliferative activity of Hypericum hircinum L. subsp. majus (Aiton)
This study was undertaken to assess the antioxidant and antiproliferative potential of the essential oil of Hypericum hircinum L. subsp. majus (Aiton) N. Robson. Analysis of the oil composition revealed that sesquiterpene hydrocarbons (69.3%) dominate, cis-β-guaiene, δ-selinene and (E)-caryophyllene being the most representative. Significant values of antioxidant activity were found using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) radical scavenging assays. The essential oil revealed antiproliferative activity as evaluated on human glioblastoma (T98G), human prostatic adenocarcinoma (PC3), human squamous carcinoma (A431) and mouse melanoma (B16-F1) tumour cell lines by MTT assay.