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. 2020 Sep 24;10(10):1363. doi: 10.3390/biom10101363

Table 4.

Composition of crude WS extract and DCM-EtOH fractions.

Compounds in Walnut Shell Extract * Fractions DCM-EtOH
Fatty Acids and Alcohols 97–3 (1) * 97–3 (2) * 97–3 (3) * 96–4 * 95–5 *
Fatty acids Acid 9:0 0.25 ± 0.02 - - - - -
Acid 18:0 0.04 a - 0.13 a - 0.01 a -
Acid 18:1 0.15 a - 0.56 ± 0.06 - - -
Acid 18:2 0.51 ± 0.05 - - - - -
Fatty alcohols Alcohol 16:0 0.40 ± 0.02 - - - - -
Terpenes and Terpenoids
Terpineol - - 0.02 a - - -
p-menthane-1,8-diol 0.06 a - - - - -
Di-and triglycerides
Diglycerides 0.45 ± 0.04 - 0.06 a - - 0.01 a
Triglycerides 0.13 a - - - - 0.01 a
Resin Acids
Resin acids Isopimaric acid 0.01a - - - - -
Unidentified RT = 22:03-27:80 0.11 a 0.02 a 0.02 a 0.02 a - -
Modified resin acids X-OH-7oxoDHA acid - - 0.03 a 0.01 a - -
Dihydroxy-DHA acid 1.39 ± 0.21 - - - - -
9-hydroxystearic acid 0.01 a - 0.01 a - - -
X-hydroxyabietic acid 0.02 a - - - - -
Steroids
Sitosterol 0.17 ± 0.03 - 0.59 ± 0.09 - - -
Unidentified RT = 28:04-30.69 - - 0.05 a - - -
Phenolic Compounds
Phenols Vanillin - - 0.07 a - 0.01 a -
Rhododendrol 0.01 a - - - - -
3,4-dihydroxybenzaldehyde 0.01 a - - - - -
3-methoxy-4-OH-cinnamaldehyde 0.06 a - 0.05 a - - -
Gallic acid 0.32 ± 0.02 0.01 a - - 0.01 a -
Protocatechuic acid 0.13 a - - - - -
Tyrosol 0.24 ± 0.01 - - - - -
Dihydroconiferyl alcohol 0.28 ± 0.01 - 0.04 a - - -
Syringic acid 0.05 a - - 0.01 a - -
Vanillic acid 0.07 a - 0.01 a 0.01 a - -
4-hydroxybenzoic acid 0.13 a - - - - 0.01 a
Phenolic acid Sinapyl alcohol 0.24 ± 0.02 - 0.04 a 0.01 a - -
1-guaiacyl-3-OH-1-propanone 0.03 a - - - - -
1-guaiacyl-2-OH-1-ethanone 0.03 a - 0.01 a - - -
1-syringylglycerol 0.04 a - 0.01 a 0.03 a 0.01 a 0.01 a
1-guaiacyl -2,3-diOH-1-propanone 0.04 a - 0.01 a - 0.01 a 0.01 a
1-guaiacylglycerol 0.16 ± 0.01 - - - - -
1,3-(bis-guaiacyl)-1,2-propandiol 0.09 a - - - - 0.01 a
P-hydroxyphenyl glycerol 0.04 a - - - - 0.01 a
Coniferyl alcohol 0.25 ± 0.03 - 0.03 a 0.01 a - -
Stilbenes and diarylheptanoids 4,4′-diOH-3,3′-dimethoxystilbene 0.01 a - - 0.02 a 0.01 a -
X-c4h4(oh)3; c5h6(oh)3 0.23 ± 0.02 - 0.02 a 0.01a 0.01 a -
Lignans Resorcinol 0.10 ± 0.02 - - - - -
Olivil 0.01 a - 0.01 a - - -
glucopyranoside2[-4(OH)phe] 0.02 a - - - - -
HMR - - - 0.01 a - -
Todolactol 0.17 ± 0.03 - 0.01 a 0.01 a 0.01 a 0.01 a
Flavonoids
tannins Ellagic acid 0.04 a - 0.01 a- 0.01 a - -
Flavonoids Pinobanksin 0.01 a - - - - -
Pinocembrin 0.06 a - - 0.02 a 0.01 a -
(+)-Catechin 0.02 a - 0.02 a - - 0.01 a
Dihydromyricetin 0.03 a - - - - -
Quercetin 0.05 a - 0.03 a - - -
Taxifolin 0.21 ± 0.04 - - 0.01 a - -
Gallocatechin 0.22 ± 0.02 - - 0.06 a 0.02 a -
3′,4′,5′,3,X-PentaOH-dyhydroflavanol 0.07 a - - - 0.01 a 0.01 a
Monomethyl gallocatechin 0.02 a - - - - -
Other Compounds
Sugar derivatives Monosaccharides 6.84 ± 1.02 - 0.88 ± 0.08 0.01 a 0.01 a -
Sugar acids 1.20 ± 0.09 - 0.06 a - - -
Sugar alcohol 1.17 ± 0.06 - 0.01 a - - -
Others Carboxyl acid 1.12 ± 0.14 - - - - -
Alpha-lapachone 0.01 a - 0.02 a - - -
Dehydro-alpha-lapachone 0.07 a - 0.10 ± 0.01 - - -
Hydroquinone- β-d-glucopyranoside 0.06 a - - - - -
3-OH-2-methyl-pyran-4-one 0.01 a - 0.01 a 0.02 a - -
Non-identified 0.13 ± 0.03 - 0.24 ± 0.03 - - -

Standard deviation (n = 3); a s.d. < 0.01. * mg of extracts per g of shells.