Essential oils from five species of Annonaceae from Vietnam.

The essential oils obtained by hydrodistillation from the leaves of five species of Annonaceace grown in Vietnam were analyzed by gas chromatography (GC) coupled with mass spectrometry (GC/MS). The main constituents of Artabotrys hongkongensis Hance were the sesquiterpenes spathulenol (13.1%), beta-caryophyllene (6.6%), gamma-elemene (6.3%) and delta-cadinene (6.3%). beta-Caryophyllene (12.1%), bicycloelemene (11.2%) and bicyclogermacrene (11.6%) were the predominant components of the oil of Melodorum fruticosum Lour, whereas the oil of Polyalthia longifolia var. pendula Hort was comprised mainly of beta-caryophyllene (30.0%), alpha-zingiberene (21.7%), aromadendrene (15.2%) and beta-selinene (9.1%). The main constituents of Fissistigma maclurei Merr. were germacrene D (26.1%), alpha-terpinene (8.2%), spathulenol (10.0%), and bicyclogermacrene (6.6%), while alpha-santalene (14.3%), beta-caryophyllene (6.3%), terpinen-4-ol (6.3%), caryophyllene oxide (5.7%), trans-alpha-bergamotene (5.3%) and allo-ocimene (5.3%) were identified in significant quantity from Fissistigma rufinerve (Hook.f. & Thomson) Merr.