Table 5. GC-MS analysis of heavy toasted RRG wood ethanolic extract

Peak No. Retention time (min) Area Compound name Composition (%)
1 2.808 486602.34 3-Penten-2-one, 4-methyl- 0.53
2 3.089 658750.98 Furfural 0.72
3 3.152 3321868 2-Pentanone, 4-hydroxy-4-methyl- 3.64
4 4.296 69485.55 2-Furancarboxaldehyde, 5-methyl- 0.08
5 4.634 400088.51 N-Butyl-tert-butylamine 0.44
6 5.303 401940.78 γ-Ethoxybutyrolactone 0.44
7 7.1 2559903.4 5-Hydroxymethylfurfural 2.80
8 8.599 660670.06 Phenol, 2,6-dimethoxy- 0.72
9 8.691 178448.26 Eugenol 0.20
10 8.805 1198697.7 1,6-Anhydro-β-d-talopyranose 1.31
11 9.211 7456081.5 Vanillin 8.16
12 9.726 344842.37 3,5-Dimethoxy-4-hydroxytoluene 0.38
13 9.921 235762.37 p-Propylguaiacol 0.26
14 10.127 434348.79 D-Allose 0.48
15 10.253 364646.14 Apocynin 0.40
16 10.756 485829.63 Guaiacylacetone 0.53
17 10.865 140981.32 2(4H)-Benzofuranone, 5,6,7,7a-tetrahydro-4,4,7a-trimethyl-, (R)- 0.15
18 11.111 559878.6 4-Vinylsyringol/Canolol 0.61
19 11.277 264651.9 1’-Hydroxyeugenol 0.29
20 11.397 1086402.3 Butyrovanillone 1.19
21 11.534 304538.19 trans-4-Propenylsyringol 0.33
22 12.101 1211325.9 2,6-Dimethoxyhydroquinone 1.33
23 12.204 13019283 Syringylaldehyde 14.25
24 12.684 454016.49 Homosyringaldehyde 0.50
25 12.85 130736.45 4-Hydroxy-2-methoxycinnamaldehyde 0.14
26 12.953 522827.2 2-Propanone, 1-hydroxy-3-(4- hydroxy-3-methoxyphenyl)- 0.57
27 13.039 25665539 Coniferyl aldehyde 28.10
28 13.394 659220.88 Syringylacetone 0.72
29 13.892 319059.18 Benzeneacetic acid, 4-hydroxy-3,5-dimethoxy-, methyl ester 0.35
30 13.966 487076.72 Butylsyringone 0.53
31 14.979 102317.86 Danielone 0.11
32 15.397 880089.96 Acethydrazide, 2-(2-benzothiazolylthio)-N2-(3- fluorobenzylideno)- 0.96
33 15.546 26272994 3,5-Dimethoxy-4-hydroxycinnamaldehyde 28.76
Total 100
GC-MS: gas chromatography-mass spectrometry, RRG: river red gum.