Sesquiterpenes from the Stem Bark of Guarea guidonia (L.) Sleumer (Meliaceae)

Abstract The chemical composition of the essential oil, isolated by steam distillation from the stem bark of Guarea guidonia, was analyzed for the first time. The major components were identified as β-caryophyllene (25%) and germacrene D (24%) using a combination of GC, GC/MS, 13C- and 1H-NMR.