Chemical variability of Conyza sumatrensis and Microglossa pyrifolia from Côte d'Ivoire

Five samples of essential oils from the leaves, flowers and root bark of Conyza sumatrensis Retz E. K. Walker and four samples from the leaves and buds of Microglossa pyrifolia , obtained by hydrodistillation, were investigated by GC–RI and 13 C‐NMR. One sample of leaf essential oil of C. sumatrensis was investigated by a combination of CC, GC–RI and 13 C‐NMR. The leaf and flower oils of C. sumatrensis were dominated by limonene (13.0–25.5%), ( E )‐ β ‐farnesene (7.8–17.5%), germacrene D (3.6–13.6%), ( E )‐ β ‐caryophyllene (9.1–15.8%) and the root bark oil by ( Z )‐lachnophyllum acid methyl ester (75.0%). The leaf oil of M. pyrifolia was dominated by α ‐humulene (27.1–36.4%) and α ‐pinene (18.7%) or Δ 3 ‐carene (15.3%) or ( E )‐ β ‐ocimene (13.4%) and germacrene D (17.4%). The bud oil of the same plant was dominated by ( E )‐ β ‐ocimene (21.6%) and germacrene D (20.7%).