Table 2.
Chemical compositions of Speranskia tuberculata essential oil as identified by gas chromatography–mass spectroscopy (GC–MS)
| Numbers | Compound | Retention time, minutes | Percentage |
|---|---|---|---|
| 1 | 1,8-Cyclopentadecadiyne | 6.07 | 0.38 |
| 2 | 3,4-Divinylcyclohexene | 6.20 | 2.41 |
| 3 | Caryophyllene | 6.65 | 43.74 |
| 4 | Aromadendrene | 6.70 | 5.36 |
| 5 | 2-Vinylbicyclo[2.2.1]heptane | 7.03 | 1.48 |
| 6 | 5,9-Tetradecadiyne | 7.11 | 0.75 |
| 7 | 3,3,6,6,9,9-Hexamethyl tetracyclo[6.1.0.0(2,4).0(5,7)]nonane | 7.37 | 35.82 |
| 8 | 1,9-Decadiyne | 7.52 | 2.96 |
| 9 | Methyl trans-2-(3-cyclopropyl-7-norcaranyl)acetate | 7.69 | 0.25 |
| 10 | Oxacyclotetradeca-4,11-diyne | 7.76 | 1.81 |
| 11 | 10,12-Octadecadienoic acid | 8.51 | 0.38 |
| 12 | 2-Cyclopropyl-2-methylspiro[2.2]pentane-1-carboxylic acid | 8.56 | 0.97 |
| 13 | (3E)-3-Undecen-1-yne | 9.20 | 1.19 |
| 14 | Z,Z,Z-4,6,9-Nonadecatriene | 9.35 | 1.54 |
Notes: Identification of compounds was done by comparison of their mass spectra with those recorded in the MS library database (NIST 11). Relative area percentages of the identified constituents were calculated based on GC peak areas without any correction factor.