Abstract

Coleus aromaticus Benth. collected from mid hill and foot hill regions of northern India was investigated for essential oil composition using gas chromatography (GC-FID) and gas chromatography-mass spectrometry (GC-MS). A total of forty-four constituents representing 85.9– 98.9 % of the oil composition were identified. Major components of these oils were thymol (57.7–66.4 %), γ-terpinene (5.811.7 %), p-cymene (4.1–14.2 %), (E)-caryophyllene (2.6–3.6 %), caryophyllene oxide (1.3–1.5 %), and 1octen-3-ol (1.0–1.8 %). The thymol content was higher in foot hills as compared to mid hills.

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