GC-MS analysis of essential oil of Pogostemon cablin growing in Indonesia extracted by microwave-assisted hydrodistillation

The essential oil from the leaf of Pogostemon cablin, grown in Indonesia was extracted by microwave-assisted hydrodistillation and analyzed by gas chromatography-mass spectrometry (GC-MS). Nineteen compounds were identified representing approximately 97.97% of the oil. The main compound of the oil was the oxygenated terpene patchoulol (26.32%). Other major compounds of the essential oil were δ-guaiene (14.69%), α-guaiene (12.18%), α-Gurjunene (11.13%), seychellene (8.42%), viridiflorol (5.93%), β-caryophyllene (4.63%) and β-patchoulene (2.87%). Four new compounds were found in this oil: 2(1H)-naphthalenone, octahydro-1-methyl-1-(2-propenyl)-, (1a,4ab,8aa)- (2.64%); iso-.aplha.-cedren-15-al (0.35%); 7-oxabicyclo[4.1.0]heptane, 1,3,3-trimethyl-2-(3-methyl-1,3-butadienyl)-, [1a,2b(Z),6a]- (0.12%) and hexahydrothunbergol (0.11%).