ISHS Acta Horticulturae 677: III WOCMAP Congress on Medicinal and Aromatic Plants - Volume 3: Perspectives in Natural Product Chemistry
A COMPARATIVE STUDY OF THE ESSENTIAL OILS OF FOUR GONIOTHALAMUS SPECIES |
| Authors: | I. Jantan, F. Ahmad, A.S. Ahmad |
| Keywords: | Goniothalamus species, Annonaceae, essential oil composition, sesquiterpenoids, monoterpenoids, chemotaxonomy |
| Abstract:
The essential oils of four Goniothalamus species (G. malayanus Hook. f. and Thoms., G. uvariodes King, G. macrophyllus Hook. F. and G. andersonii J. Sinclair) were examined by capillary GC and GC-MS. The chemical components were identified by comparison of their mass spectral data with those existing in the Wiley library, their retention indices and co-chromatography of some constituents with authentic samples on two columns of different polarity. The leaf oils of G. uvariodes and G. malayanus were made up mainly of sesquiterpenoids where  -cubebene (15.2%) and -selinene (33.6%) were the most abundant compounds, respectively.
The bark oils of both species were also rich in sesquiterpenoids with eudesmols as the major compounds.
The root oil of G. malayanus was qualitatively similar to its bark oil.
However, the major group of compounds in the root oil of G. uvariodes was monoterpenoids where terpinen-4-ol (39.5%) and 1,8-cineole (14.0%) were the main representatives.
Monoterpenoid was also the major group in the bark oil of G. macrophyllus with terpinen-4-ol, (Z)- -ocimene,  -terpineol and 1,8-cineole present in significant amounts.
The leaf oil of G. andersonii was characterized by its richness in sesquiterpenoids where guaiol (28.6%) and elemol (19.6%) were the major components.
The distribution of the terpenoids in different parts of the plants may
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