Chemical composition and chiral analysis of ß-myrcene rich essential oil from Glossocardia bosvallia (L.f.) DC.

Essential oil from the aerial parts and flowers of Glossocardia bosvallia (L.f.) DC. was analysed using GC, chiral GC, GC-MS and NMR spectroscopy. Chemical composition and identification of compounds in the essential oils were determined by GC and GC-MS analysis respectively. GC analysis depicted ß-myrcene as the major compound in both the essential oils, aerial parts containing 61.59% and flowers constitutes 44.86%. Occurrence of ß-myrcene was also confirmed using 1H, 13C and DEPT 135° NMR spectroscopy. Chiral GC illustrated the enantiomeric composition of monoterpene hydrocarbons, in which (1S)-(-)-ß-pinene, (-)-sabinene and (4S)-(-)-limonene were the major enantiomers. The present study reports the essential oil composition and enantiomeric composition of ß-myrcene rich G. bosvallia essential oil for the first time. G. bosvallia essential oil can be a good source of ß-myrcene, a compound with wide range of biological properties.

Chemical composition of a volatile fraction from the leaves of Clerodendrum infortunatum L.

The volatile composition of plants is of great importance because of its wide applications in aromatherapy, pharmaceuticals, perfumes and chemical ecology. This article describes the volatile fraction of Clerodendrum infortunatum L. leaves extracted by partitioning the hydro-distillate using hexane. A fatty acid derivative, 1-octen-3-ol is found as the main component in the volatile fraction ranging from 48.7 to 63.7%. Other compounds found with significant amounts were trans-3-hexenol, 1-hexanol, (3E)-hexen-1-ol acetate, 3-octanone, phenylacetaldehyde, linalool and methyl salicylate. Irregular terpenoid compounds like (E)-ß-damascenone, (E)-ß-ionone and isophorone are also present in the volatile part of C. infortunatum. The chemical composition of the volatile fraction was identified by spectroscopic analysis, GC and GC-MS.