Abstract
The volatile constituents were isolated by hydro-distillation of the aerial parts of Emilia sonchfolia (L.) DC. (Asteraceae). The constituents were analyzed for the first time by gas chromatography equipped with flame ionization detector (GC-FID) and gas chromatography coupled with mass spectrometry (GC/MS). Forty-three compounds were identified, representing 96.3% of the total oil. The major constituents were γ-muurolene (32.1%) and β-caryophyllene (22.7%). The other minor constituents were (E)-β-ocimene (4.0%), α-muurolene (3.9%), δ-cadinene (3.7%) and epi-α-cadinol (3.7%). The oil was found to be rich in sesquiterpene hydrocarbon (67.6%) type constituents.
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