This study was carried out to evaluate the in vitro antioxidant activity and chemical composition of essential oils organic extracts Moroccan Tetraclinis articulata cones (Khemisset region). The GC–MS analysis identified a total 23 volatile components. major constituents oil were ?-pinene (18.33%), cis-verbenone (10.02%), L-pinocarveol (8. 32%). For phytosterols hexane extract, ?-sitosterol con...