Essential oil composition from Duguetia species (Annonaceae)

The leaf and fine stems and the bark oils of Duguetia eximia, D. flagellaris, D. pycnastera, D. riparia and D. trunciflora were obtained by hydrodistillation and analyzed by GC and GC/MS. The main constituents found in the leaf and fine stems oil of D. eximia were alpha-eudesmol (80.3%) and spathulenol (5.0%). The leaf and fine stems oil of D. flagellaris was dominated by spathulenol (58.7%) and alpha-muurolol (6.2%); the bark oil was dominated by germacrene D (16.5%), cyperene (10.6%), alpha-muurolol (8.6%), humulene epoxide II (5.3%) and spathulenol (5.0%). The major components identified in the leaf and fine stems oil of D. pycnastera were spathulenol (52.2%), allo-aromadendrene (9.1%), germacrene D (7.1%) and elemol (5.1%). The leaf and fine stems oil of D. riparia contained spathulenol (46.5%), caryophyllene oxide (28.9%) and alpha-pinene (6.1%) as their main compounds. The leaf and fine stems oil of D. trunciflora was dominated by alpha-pinene (21.1%), bicyclogermacrene (17.6%), bulnesol (10.6%), spathulenol (10.5%), guaiol (8.1%), globulol (5.7%) and humulene epoxide II (5.0%); the bark oil was dominated by beta-phellandrene (45.7%), guaiol (8.3%) and alpha-cadinol (7.4%).