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. 2018 May 15;13(5):e0197135. doi: 10.1371/journal.pone.0197135

Table 4. Composition of dichloromethane extracts of Quercus faginea bark, in % of the normalized chromatographic peak areas in TIC of the compounds detected by GC-MS.

Compounds Site 1 Site 2 Mean±SD
Aromatics 14.8±5.7 10.7±5.9 12.9±5.8
Vanillin 2.3±0.2 1.6±1.4 2.0±0.8
Vanillic acid 5.0±0.4 3.8±1.5 4.4±1.0
Ferulic acid 5.7±4.9 4.4±2.0 5.1±3.4
2,3-Dihydroxy-1-(4-hydroxy-3-methoxyphenyl)-propan-1-one 1.8±0.2 0.9±1.0 1.4±0.6
Glycerol and derivatives 159.5±131.9 78.2±56.9 122.9±94.4
Glycerol 113.0±104.9 13.2±12.6 63.1±58.8
1-Monohexadecanoylglycerol 19.1±4.8 20.1±10.0 19.6±7.4
1-Monooctadecanoylglycerol 10.1±1.2 5.9±4.1 8.0±2.6
Monoacylglycerol C24 7.7±4.4 8.1±7.0 7.9±5.7
Monoacyl glycerol C26 9.6±16.6 38.9±23.2 24.3±19.9
1-Alkanols 16.7±5.9 17.9±5.8 17.2±7.8
1-Hexadecanol 0.3±0.3 0.5±0.5 0.4±0.4
1-Octadecanol 0.9±0.6 3.9±1.7 2.4±1.2
1-Eicosanol 2.5±2.5 5.1±1.3 3.8±1.9
1-Tetracosanol 8.6±1.9 4.5±1.0 6.6±1.4
1-Tricosanol 4.4±0.6 3.9±1.3 4.2±1.0
Saturated alkanoic acids 304.1±62.6 162.7±36.0 233.7±48.8
Nonanoic acid 1.7±0.2 0.5±0.5 1.1±0.4
Decanoic acid - 0.1±0.1 0.1±0.1
Dodecanoic acid 1.3±1.5 1.2±0.6 1.3±1.1
Tetradecanoic acid 3.6±0.5 3.9±1.7 3.8±1.1
Pentadecanoic acid 2.5±0.2 2.7±0.7 2.6±0.4
Hexadecanoic acid 194.7±45.1 73.7±20.8 134.2±33.0
Heptadecanoic acid 3.3±0.3 3.1±0.8 3.2±0.6
Octadecanoic acid 26.1±0.9 18.7±4.7 22.4±2.8
Eicosanoic acid 8.7±0.9 4.9±0.2 6.8±0.6
Heneicosanoic acid 5.1±1.7 3.2±1.2 4.2±1.4
Docosanoic acid 29.0±3.1 17.3±1.2 23.2±2.2
Tricosanoic acid 4.4±1.0 4.3±1.0 4.4±0.5
Tetracosanoic acid 21.7±3.8 23.0±0.6 22.4±2.2
Hexacosanoic acid 2.0±3.4 6.1±1.9 4.0±2.4
Substituted alkanoic acids 50.4±30.6 38.9±27.1 44.7±28.8
9-Hexadecenoic acid 1.2±0.1 0.7±0.6 1.0±0.4
9.12-Octadecadienoic acid 12.4±7.5 9.7±2.4 11.0±5.0
11-Octadecenoic acid 33.9±22.8 26.8±22.4 30.4±22.6
13-Octadecenoic acid 2.9±0.2 1.7±1.7 2.3±0.8
Saturated ω-hydroxyacids 6.2±3.4 8.2±5.6 7.2±4.6
22-Hydroxydocosanoic acid 5.2±1.7 2.9±3.0 4.0±2.4
24-Hydroxytetracosanoic acid 1.0±1.7 5.3±2.6 3.2±2.2
Saturated ɑ,ω-alkanoic diacids 11.2±5.0 2.3±1.0 6.7±2.9
Octanedioic acid 1.2±1.2 0.6±0.1 0.9±0.6
Nonanedioic acid 7.9±2.0 1.7±0.9 4.8±1.4
Hexadecanedioic acid 2.1±1.8 - 1.0±0.9
Sterols 27.8±6.6 202.8±120.4 118.1±63.5
Campesterol - 1.5±2.5 0.8±1.2
Stigmasterol 0.6±0.1 11.9±11.4 9.0±5.8
β-Sitosterol 27.2±6.5 168.4±85.9 97.8±46.2
Stigmastanol 0.00±0.00 21.0±20.6 10.5±10.3
Triterpenes/Triterpenoids 160.6±100.2 195.4±129.4 178.0±114.7
β-Amyrin 18.6±6.6 14.9±12.9 16.8±9.8
α-Amyrin 3.3±5.7 21.3±24.4 12.3±15.0
Friedelin 51.1±35.2 64.4±36.4 57.8±35.8
Lupeol 12.0±3.5 26.1±19.4 19.0±11.4
Olean-18-ene 20.7±25.3 23.4±13.6 22.1±19.4
Betulin 15.1±6.4 6.9±5.3 11.0±5.8
Betulinic acid 18.7±10.5 30.0±12.1 24.4±11.3
Ursolic acid 21.1±7.0 8.4±5.3 14.8±6.2
Identified 741.3±351.9 717.1±388.1 741.4±371.3
Non Identified 258.7 282.9 258.6
Total 1000.0 1000.0 1000.0