GC-MS analysis of the volatile constituents of Orthosiphon pallidus Royle, ex Benth

Abstract

The hydro-distilled essential oil from aerial parts of Orthosiphon pallidus Royle, ex Benth (Lamiaceae) was investigated by using gas chromatography equipped with a flame ionisation detector (GC-FID) and gas chromatography coupled with a mass spectrometry (GC-MS). Fifty-two compounds, representing 98.4% of the total oil constituents, were identified. The major constituents were β-caryophyllene (17.4%) and 7-epi-α-selinene (15.2%). The other minor constituents were terpinolene (6.9%), β-pinene (6.8%), β-elemene (5.1%), α-humulene (4.9%), α-copaene (4.8%), epi-cubebol (4.5%) and zonarene (3.9%). The oil was found to be rich in sesquiterpene hydrocarbon type constituents. Lamiaceae

Keywords:

• Orthosiphon pallidus Royle
• ex Benth
• Essential oil composition
• β-Caryophyllene
• 7-epi-α-Selinene
• GC-MS

Acknowledgments

The author is grateful to the Indian Council of Medical Research (ICMR), New Delhi, India for providing the necessary facilities, and is thankful to Mr Mahesh B. Wagharwadi, Multi Tasking Staff (MTS), Department of Phytochemistry, ICMR-NITM, Belagavi for processing of the plant material and extraction of the oil.

Disclosure statement

No potential conflict of interest was reported by the author.