Constituents of the stem and root essential oils of Kadsura heteroclita (Roxb.) Craib from Vinh Phuc province

Abstract

The stem and root essential oils of Kadsura heteroclita (Roxb.) Craib were prepared by steam distillation of fresh materials in a glass for 3h. The essential oils yields were 0.37% and 0.30% from the roots and stems (in absolute dry material), respectively.

The stem and root essential oils from Kadsura heteroclita (Roxb.) Craib analyzed by GC and GC/MS showed 26 constituents and 41 constituents identified in the stem and root essential oils, respectively.

The major components of the root essential oil of Kadsura heteroclita are: epi-bicyclogermacrene (19.6%), terpinolene-4-ol (13.3%), d-cadinene (8.9%) and spathulenol (7.7%). The major components of the stem essential oil of Kadsura heteroclita are: terpinolene-4-ol (22.4%), bicyclo[4.4.0]dec-1-ene (18.9%), d-cadinene (8.8%), a-cadinol (6.2%) and cadina-1,4-diene (6.0%).

Most of major components of root and stem essential oils extracted from Kadsura heteroclita are similar, such as, terpinolen-4-ol (13.3% in roots and 24,4% in stems), d-cadinen (8.9% in roots and 8.8% in stems), a-copaen (3.7% in root and 3.8% in stems), a-cadinol (4.2% in roots and 6.2% in stems). But the major component in the stem oil as epi-bicyclogermacren (19.6%) did not appear in the root oil; while the bicyclo [4.4.0] dec-1-en (18.9%) only found in the root oil of K. heteroclita.

The major constituents of the stem essential oils of Kadsura heteroclita (Roxb.) Craib from Vietnam and China are extremely variable.