17.

Composition of Stem Bark Essential Oils of Three Vietnamese Essential Oils of Three Vietnamese Species of Kadsura (Schisandraceae)

Do N. Dai, Bui V. Thanh, Luu D.N. Anh, Ninh K. Ban, Tran D. Thang, and Isiaka A. Ogunwande

Faculty of Biology, Vinh University, 182-Le Duan, Vinh City, Nghean Province, Vietnam

Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam

Institute of Marine Biochemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam

Faculty of Chemistry, Vinh University, 182-Le Duan, Vinh City, Nghean Province, Vietnam

Natural Products Research Unit, Department of Chemistry, Faculty of Science, Lagos State University, Badagry Expressway Ojo, P. M. B. 0001, Lasu Post Office, Ojo, Lagos, Nigeria

Abstract: T he chemical composition of volatiles from the stem barks of three different Kadsura species has been studied. The essential oils were obtained by hydrodistillation and analyzed by GC and GC-MS. The components were identified by MS libraries and their LRIs. The essential oils content varied between 0.15% and 0.20% (v/w), calculated on a dry weight basis. Sesquiterpene hydrocarbons (25.2% - 57.9%) and oxygenated sesquiterpenes (27.1%- 64.4%) are the main oil fractions . Kadsura coccinea(Lemaire) A. C. Smith., afforded oil whose major compounds were b -caryophylene (23.6%), d -cadinene (8.6%), caryophyllene oxide (7.8%) , epi- a -bisabolol (7.5%) and a -copaene (6.6%) . On the other hand, a -muurolol (43.5%) was the most singly abundant constituent of Kadsura longipeduculata Finet & Gagnepain. , with minor amounts of a -cadinol (5.4%), b -caryophylene (5.4%) and d -cadinene (5.0%). However, we have identified a -acorenol (10.1%), d -cadinene (9.6%), g -cadinene (8.1%) and d -elemene (6.8%) as the major constituents of Kadsura induta A. C. Smith.

Keywords: Kadsura; essential oil composition; terpenes. © 2015 ACG Publications. All rights reserved.