Abstract
The chemical compositions of leaf essential oils of Eucalyptus goniocalyx F. Muell. (Syn. E. elaeophora) and Eucalyptus patens Benth. from Rwanda were determined by GC and GC/MS. About 60 compounds have been identified in both oil samples which are monoterpenoid in character (E. goniocalyx, 72.8% ; E. patens, 91.2%). The major components of the oil of E. goniocalyx are α-pinene (29.0%), 1,8-cineole (18.0%), and p-cymene (17.2%). In E. patens oil, 1,8-cineole is the constituent that is most abundant (39.6%) followed by limonene (32.5%) and α-pinene (11.3%). Among the minor compounds of E. goniocalyx and E. patens oils, 2,3-dioxabicyclo[4.4.0] decane structures and derivatives (respectively 3.9% and 0.3%) were identified for the first time in the volatile oils of these two species.
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