Abstract

Leaves and flowers of Achyrocline alata were picked in an experimental garden throughout the period of 7 AM until 2 PM, in hourly intervals. The leaf and flower oils were obtained by hydrodistillation. Analyses of the oils by GC/MS reveals that the main components of the leaf oil varied as follows: α-pinene (1.7–7.6%), 1-octen-3-ol (1.7–5.6%), 1,8-cineole (0.4–5.1%), β-caryophyllene (14.6–16.7%), α-humulene (20.6–25.1%) and bicyclogermacrene (7.3–12.4%). The flower oil also varied—α-pinene (5.4–21.9%), 1-octen-3-ol (8.0–11.6%), 1, 8-cineole (7.3–10.9%), β-caryophyllene (12.0–17.5%), α-humulene (17.2–22.8%) and bicyclogermacrene (5.8–8.3%)—throughout the 8-h period.

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