Table 5.
Chemical composition of major constituents in three Vetiveria zizanioides (vetiver) root crude extracts and a commercial vetiver oil, determined by GC/MS analysis.
| Sourcea | Compound nameb | Retention time | Component percentage under peakc | Molecular formula | Molecular weight |
|---|---|---|---|---|---|
| 2-mon VRE | 3,3,8,8-Tetramethyltricyclo[5.1.0.0(2,4)]oct-5-ene-5-propanoic acid (a sesquiterpene acid) | 20.11 | 42.8 | C15H22O2 | 234 |
| 6-Isopropenyl-4,8a-dimethyl-1,2,3,5,6,7,8,8a-octahydronaphthalen-2-ol (a sesquiterpene alcohol) | 19.46 | 11.2 | C15H24O | 220 | |
| 1-yr VRE | 3,3,8,8-Tetramethyltricyclo[5.1.0.0(2,4)]oct-5-ene-5-propanoic acid | 20.12 | 26.1 | C15H22O2 | 234 |
| 6-Isopropenyl-4,8a-dimethyl-1,2,3,5,6,7,8,8a-octahydronaphthalen-2-ol | 19.47 | 3.0 | C15H24O | 220 | |
| Ethyl hexadecanoate (ethyl palmitate) | 21.86 | 32.3 | C18H36O2 | 284 | |
| Ethyl 9,12-Octadecadienoate (ethyl linoleate) | 23.42 | 18.9 | C20H36O2 | 308 | |
| 4-yr VRE | 3,3,8,8-Tetramethyltricyclo[5.1.0.0(2,4)]oct-5-ene-5-propanoic acid | 20.17 | 14.1 | C15H22O2 | 234 |
| 6-Isopropenyl-4,8a-dimethyl-1,2,3,5,6,7,8,8a-octahydronaphthalen-2-ol | 19.46 | 9.9 | C15H24O | 220 | |
| VO | 3,3,8,8-Tetramethyltricyclo[5.1.0.0(2,4)]oct-5-ene-5-propanoic acid | 20.15 | 0.7 | C15H22O2 | 234 |
| 6-Isopropenyl-4,8a-dimethyl-1,2,3,5,6,7,8,8a-octahydronaphthalen-2-ol | 19.47 | 17.1 | C15H24O | 220 | |
| 2-(4a,8-Dimethyl-1,2,3,4,4a,5,6,7-octahydro-naphthalen-2-yl)-prop-2-en-1-ol(the sesquiterpene alcohol γ-costol) | 19.95 | 10.5 | C15H24O | 220 |
a2-mon VRE = vetiver root ethanol extracts from greenhouse-grown, 2-mon-old cv. Sierra; 1-yr VRE = vetiver root ethanol extracts from field-grown, 1-yr-old cv. Songkha 3; 4-yr VRE = vetiver root ethanol extracts from greenhouse-grown, 4-yr-old cv. Sierra; VO = commercial vetiver oil.
bThe components were identified based on the NIST mass spectra library.cRepresents highest area peak of a given compound, and does not include any further isomers.