Three medicinal species of the genus Echinacea (Asteraceae), i.e. E. purpurea, E. pallida and E. angustifolia, were cultivated in the experimental field of the Medicinal Plants and Drugs Research Institute of Shahid Beheshti University (Tehran, Iran). The essential oil of flowerheads of the studied species was isolated by hydrodistillation. The essential oils were analyzed by GC and GC-MS. In total, 36, 30 and 36 constituents were identified and quantified in E. purpurea, E. pallida and E. angustifolia, respectively. Sesquiterpene hydrocarbons were the main group of compounds in E. purpurea (70.9%), E. angustifolia (70%) and E. pallida (62.6%). The content of germacrene-D in E. purpurea (57%) was higher than that in E. pallida (51.4%) and E. angustifolia (49.6%) as the principal component in all samples. Also, the monoterpene hydrocarbons were observed in the oil of E. purpurea (6.4%) and E. angustifolia (1.2%), while these compounds were completely absent in E. pallida oil.
No takes yet. Share an insight, caveat, or question.
Mirjalili et al. (2006) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: