Composition analysis of volatile oils from flowers, leaves and branches ofCinnamomum camphorachvar.Borneolin china

The essential oils obtained by hydrodistillation of flowers, young leaves and epicormic branches of Cinnamomum camphora chvar. Borneol were comparatively studied by gas chromatography with flame ionization detector (GC/FID) and GC/mass spectrometry (GC/MS). Among the verified constituents, oxy-terpene accounted for the most abundant constituent in all volatile oils (flowers 50.83%, leaves 70.75%, branches 78.22%). d-Borneol, the characteristic oxy-terpene of the volatile oils of C. camphora chvar. Borneol, was the highest-content compound among all the three parts (flowers 12.13±0.67 g/kg, leaves 17.22±0.85 g/kg and branches 4.47±0.79 g/kg), while camphor was absent in flowers, low in leaves (0.05±0.01 g/kg) but rich in branches (1.09±0.44 g/kg). These findings suggested that volatile oils from the leaves and flowers of C. camphora chvar. Borneol would serve as a better resource for d-borneol preparation, and there might be an α-pinene–borneol–camphor bioconversion during the growth time extension of C. camphora chvar. Borneol (flower < leaf < branch)