The aerial part (leaves, flowers and stem) of C. ambrosioides was collected on the Dschang
University Campus in August 2008 and its taxonomic identification performed at the National
Herbarium of Yaounde/Cameroon. A voucher specimen was deposited in the Herbarium of the
Biochemistry Department of the University of Dschang. The essential oil was obtained by
hydrodistillation for 5 h of fractions of fresh aerial plant material (3000 g) using a Clevenger-type apparatus. The oil obtained was dried over a column of anhydrous sodium sulphate and stored in dark bottles at +4 ºC until analysis