Table 1.
Chemical compositions and relative amounts of the essential oils from S1, S2 and S3.
| No. | Compounds | RI a | Relative amount (%) c | Identification | |||
|---|---|---|---|---|---|---|---|
| S1 | S2 | S3 | |||||
| Sesquiterpenes and aromatics | 80.00 | 89.01 | 8.93 | ||||
| 1 | Benzylacetone * | 1257 | 7.91 | 2.34 | - b | RI,MS, | |
| 2 | Vanillin | 1418 | - | - | 0.46 | RI[15],MS | |
| 3 | α-Humulene | 1464 | 0.30 | - | - | RI,MS,[16,17] | |
| 4 | α-Selinene | 1493 | 0.45 | 3.71 | - | RI[18],MS | |
| 5 | α-Agarofuran | 1535 | - | 0.24 | - | RI[18],MS | |
| 6 | Elemol | 1556 | 0.32 | 0.71 | - | RI[19,24],MS | |
| 7 | 2,6-Dimethyl-10-methylene-12-oxatricyclo[7.3.1.0(1,6)]tridec-2-ene | 1576 | 0.37 | 0.61 | - | MS | |
| 8 | 5β,7βH,10α-Eudesm-11-en-1α-ol | 1583 | 0.54 | 0.66 | - | MS | |
| 9 | Caryophyllene oxide | 1588 | 2.22 | 2.12 | - | RI[19,24],MS | |
| 10 | 2H-Benzocyclohepten-2-one, 3,4,4a,5,6,7,8,9-octahydro-4a-methyl-, (S)- | 1593 | - | 0.20 | - | MS | |
| 11 | Isoaromadendrene epoxide | 1606 | 0.94 | 2.77 | - | RI[20],MS | |
| 12 | γ-Eudesmol | 1632 | 1.06 | 2.84 | 0.50 | RI[21],MS[22] | |
| 13 | Hinesol | 1638 | 6.34 | 0.34 | - | RI[23],MS | |
| 14 | Agarospirol | 1643 | 0.80 | 4.03 | 0.85 | RI[24],MS | |
| 15 | Cubenol | 1647 | 2.21 | 1.97 | - | RI[25],MS | |
| 16 | cis-Z-α-Bisabolene epoxide | 1651 | 0.83 | 0.78 | - | RI[26],MS | |
| 17 | (-)-Aristolene | 1654 | 0.61 | 4.70 | 1.31 | MS[22] | |
| 18 | Guaiol | 1661 | 9.34 | 10.67 | 2.18 | MS[27,28,29] | |
| 19 | Eudesm-7(11)-en-4α-ol | 1666 | 4.35 | 2.09 | - | RI,MS[30] | |
| 20 | Aromadendrene oxide (1) | 1674 | 1.27 | 1.41 | - | RI[31],MS | |
| 21 | 6-Isopropenyl-4,8a-dimethyl-1,2,3,5,6,7,8,8a-octahydro-naphthalen-2-ol | 1678 | 1.19 | 1.33 | - | RI[20],MS | |
| 22 | α -Copaen-11-ol | 1686 | 4.06 | 10.22 | - | RI,MS[32] | |
| 23 | 4,4,11,11-tetramethyl-7-tetracyclo-[6.2.1.0(3.8)0(3.9)]undecanol | 1690 | 0.53 | 1.50 | - | MS | |
| 24 | Bicyclo[4,4,0]dec-2-ene-4-ol,2-methyl-9-[prop-1-en-3-ol-2-yl] | 1697 | 3.11 | 0.52 | - | MS | |
| 25 | Diepi-α-cedrene epoxide | 1701 | 6.00 | 0.38 | - | MS | |
| 26 | Aromadendrene oxide (2) | 1705 | - | 1.88 | - | RI[33],MS | |
| 27 | Baimuxinal | 1707 | 2.44 | 14.78 | 1.52 | MS[27,28,32] | |
| 28 | Selina-3,11-dien-14-al | 1733 | 5.50 | 0.38 | - | RI[18], MS | |
| 29 | 5(1H)-Azulenone, 2,4,6,7,8,8a-hexahydro-3,8-dimethyl-4-(1-methylethylidene)-, (8S-cis)- | 1736 | 0.21 | 1.03 | - | RI,MS | |
| 30 | Guaia-1(10),11-dien-9-one | 1753 | 10.89 | - | - | RI[18],MS | |
| 31 | 1,2,5,5,8a-Pentamethyl-1,2,3,5,6,7,8,8a-octahydronaphthalen-1-ol | 1755 | - | 5.82 | - | RI[34],MS | |
| 32 | 6-Isopropenyl-4,8a-dimethyl-3,5,6,7,8,8a-hexahydro-2(1H)-naphthalenone | 1769 | 1.65 | 0.54 | - | RI[34],MS | |
| 33 | Eremophila-7(11),9-dien-8-one | 1811 | 4.54 | 5.42 | 2.11 | RI[34],MS | |
| 34 | Acetic acid, 3-hydroxy-6-isopropenyl-4,8a,dimethyl-1,2,3,5,6,7,8,8a-octahydronaphthalen-2-yl ester | 1847 | - | 3.04 | - | RI[34],MS | |
| Fatty acid and Alkanes | 5.75 | 0.64 | 79.31 | ||||
| 35 | Tetradecanoic acid | 1772 | - | - | 2.36 | RI[35],MS | |
| 36 | Nonanoic acid | 1278 | - | - | 1.50 | RI[36],MS | |
| 37 | n-Decanoic acid | 1371 | - | - | 0.52 | RI[36],MS | |
| 38 | cis-5-Dodecenoic acid | 1863 | 0.20 | - | - | RI[34],MS | |
| 39 | Pentadecanoic acid | 1878 | - | - | 4.87 | RI[34],MS | |
| 40 | cis-9-Hexadecenoic acid | 1955 | - | - | 2.87 | RI[34],MS | |
| 41 | n-Hexadecanoic acid | 1982 | 0.30 | 0.06 | 49.47 | RI[34],MS | |
| 42 | Hexadecanoic acid, ethyl ester | 1996 | - | - | 1.13 | RI[34],MS | |
| 43 | Eicosane | 1999 | 0.22 | 0.58 | - | RI[34],MS | |
| 44 | Heptadecanoic acid | 2073 | - | - | 0.37 | RI[34],MS | |
| 45 | Heneicosane | 2100 | 0.51 | - | 1.09 | RI[34],MS | |
| 46 | Oleic Acid | 2153 | - | - | 10.18 | RI[34],MS | |
| 47 | Docosane | 2200 | 0.80 | - | 0.53 | RI[34],MS | |
| 48 | Tricosane | 2300 | 0.97 | - | 0.80 | RI[34],MS | |
| 49 | Tetracosane | 2400 | 0.79 | - | 0.86 | RI[34],MS | |
| 50 | Pentacosane | 2500 | 0.70 | - | 0.87 | RI[34],MS | |
| 51 | Hexacosane | 2600 | 0.62 | - | 0.80 | RI[34],MS | |
| 52 | Heptacosane | 2700 | 0.45 | - | 0.57 | RI[34],MS | |
| 53 | Octacosane | 2800 | 0.20 | - | 0.54 | RI[34],MS | |
| Others | 4.26 | 2.51 | 7.44 | ||||
| 54 | 2-Hydroxycyclopentadecanone | 1851 | 0.24 | 0.30 | 2.32 | RI[37],MS | |
| 55 | 1,2-Benzenedicarboxylic acid, bis(2-methylpropyl) ester | 1869 | 0.69 | - | 0.85 | RI[37],MS | |
| 56 | Dibutyl phthalate | 1962 | 2.13 | 1.23 | 2.47 | RI[37],MS | |
| 57 | 1,2,3,4-Tetrahydro-1-nonylnaphthalene | 2021 | 0.64 | - | - | MS | |
| 58 | 8,9-Dehydro-9-formyl-cycloisolongifolene | 2082 | 0.56 | 0.98 | - | MS | |
| 59 | γ-Palmitolactone | 2111 | - | - | 0.99 | RI[34],MS | |
| 60 | 4,8,12,16-Tetramethylheptadecan-4-olide | 2357 | - | - | 0.42 | RI[34],MS | |
| 61 | 1,2-Benzenedicarboxylic acid, mono(2-ethylhexyl) ester | 2541 | - | - | 0.39 | RI[37],MS | |
| TOTAL | 90.01 | 92.16 | 95.68 | ||||
Compounds are listed in the order of elution; a RI indicates the retention indices which were calculated against C8-C40 n-alkanes on the non-polar VF-5MS column; b not detected; c Relative amount indicates the relative amount (the peak area relative to the total peak area); * verified by the authentic compound.