The essential oils of the leaves, flowers and leaf stems of Hyptis suaveolens (L.) (Lamiaceae) from Cameroon were analyzed by GC, GC/MS and olfactometry. The oils and headspace were characterized by a high percentage of monoterpenes. The main monoterpenes in the oils and headspace were sabinene (9.3–42.2%), β-pinene (3.4–9.6%), limonene (3.2–8.0%) and p-cymene (2–3%). The sesquiterpenes were represented by β-caryophyllene (2–14%) and cis-α-bergamotene (2–3%). The oils contained also a high number of oxygenated monoterpenes and sesquiterpenes of low concentration. Some diterpenes have been identified in the oil of if H. suaveolens, particularly ar-abietatriene (2–6%), ar-abietatriene-19-ol (1%) and abietinol (1%).
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Jirovetz et al. (1999) studied this question.
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