Table 2.
Chemical composition of M. officinalis subsp. officinalis essential oil analyzed by GC–MS.
| No | Compounds | RI 1 | % |
|---|---|---|---|
| 1. | Hydroperoxide, 1-ethylbutyl | 925 | 0.11 |
| 2. | Hydroperoxide, 1-methylpentyl | 934 | 0.08 |
| 3. | p-Cymene | 1005 | 0.07 |
| 4. | beta-trans-Ocimene | 1017 | 0.09 |
| 5. | beta-cis-Ocimene | 1029 | 0.51 |
| 6. | gama-Terpinene | 1042 | 0.09 |
| 7. | Nonanal | 1092 | 0.17 |
| 8. | (R)-(+)-Citronellal | 1145 | 0.27 |
| 9. | Decanal | 1206 | 0.11 |
| 10. | Octyl acetate | 1211 | 0.08 |
| 11. | beta-Citral | 1241 | 1.15 |
| 12. | (S)-(−)-Citronellic acid, methyl ester | 1264 | 0.66 |
| 13. | alpha-Citral | 1275 | 2.06 |
| 14. | Carvacrol | 1309 | 0.18 |
| 15. | Methyl geranate | 1333 | 0.19 |
| 16. | p-Menthane-3,8-diol | 1352 | 2.14 |
| 17. | alpha-Copaene | 1394 | 2.78 |
| 18. | beta-Bourbonene | 1402 | 1.16 |
| 19. | beta-Elemene | 1408 | 2.73 |
| 20. | beta-Caryophyllene | 1442 | 27.41 |
| 21. | alpha-Cubebene | 1450 | 0.41 |
| 22. | alpha-Caryophyllene | 1476 | 3.37 |
| 23. | Alloaromadendrene | 1481 | 0.87 |
| 24. | beta-Cubebene | 1504 | 27.66 |
| 25. | (Z,E)-alpha-Farnesene | 1512 | 1.37 |
| 26. | alpha-Muurolene | 1520 | 0.96 |
| 27. | alpha-Farnesene | 1526 | 0.71 |
| 28. | gamma-Cadinene | 1534 | 1.36 |
| 29. | alpha-Cadinene | 1540 | 4.72 |
| 30. | Germacrene D-4-ol | 1596 | 1.96 |
| 31. | Caryophyllene oxide | 1601 | 4.09 |
| 32. | alpha-Cadinol | 1669 | 4.07 |
| 33. | Isoaromadendrene epoxide | 1819 | 0.98 |
| 34. | Platambin | 1849 | 2.13 |
| 35. | Murolan-3,9(11)-diene-10-peroxy | 1884 | 1.18 |
| 36. | Aromadendrene oxide | 1891 | 0.92 |
| Total: | 98.79 |
1 The retention index (RI) was calculated upon a calibration curve obtained by injecting in the same conditions as the samples of a C8-C20 alkane standard mixture.