 The dried cubeb berries contain essential oil comprising monoterpenes (sabinene 50%, α-thujene, and carene) and sesquiterpenes (caryophyllene, copaene, α- and β-cubebene, δ-cadinene, germacrene), the oxides 1,4- and 1,8-cineole and the alcohol cubebol.About 15% of a volatile oil is obtained by distilling cubeb with water.Cubebene, the liquid portion, has the formula C15H24 and comes in two forms, α- and β-.