Table 3. Phenolic compounds [mg/kg] of 95% ethanol, hot water extracts from Quercus gilva by HPLC

Compounds 95% ethanol extract Hot water extract
Leaf Branch Kernel Pericarp Leaf Branch Kernel Pericarp
Epicatechin gallate 4.07 ± 0.76a1)2) 493.33 ± 170.33b 5.23 ± 0.23a 5.87 ± 0.57a 0.00 ± 0.00a 24.67 ± 21.40a 0.00 ± 0.00a 2.70 ± 0.20a
Protocatechuic acid 91.78 ± 3.01e 227.78 ± 87.95c 9.32 ± 0.40ab 82.11 ± 5.32bc 583.33 ± 10.00f 893.33 ± 248.82d 12.77 ± 2.28a 572.22 ± 9.62abc
Ellagic acid 98.00 ± 3.71e 26.12 ± 7.46c 7.74 ± 0.62ab 21.70 ± 1.54bc 392.22 ± 18.36f 68.89 ± 17.73d 0.99 ± 0.10a 10.81 ± 0.20abc
Gallic acid 2.84 ± 1.14a 391.22 ± 140.95a 383.33 ± 34.64a 48.89 ± 3.91a 216.22 ± 10.46a 4,977.78 ± 973.16d 2,868.89 ± 381.41c 2,116.67 ± 85.05b
Isoquercitrin 0.00 ± 0.00a 3.88 ± 1.46b 0.00 ± 0.00a 0.00 ± 0.00a 0.00 ± 0.00a 0.74 ± 0.15a 0.00 ± 0.00a 0.00 ± 0.00a
Kaempferol–3–O-(2’-6’-di–O– trans-p– coumaroyl)- beta-D- glucopyranoside < LOQ3) < LOQ < LOQ < LOQ < LOQ < LOQ < LOQ < LOQ
Myricitrin 0.00 ± 0.00a 11.10 ± 5.21b 0.00 ± 0.00a 0.00 ± 0.00a 0.00 ± 0.00a 2.16 ± 0.46a 0.00 ± 0.00a 0.00 ± 0.00a
Tiliroside 3,047.78 ± 114.76c 1,590.00 ± 548.48b 1.11 ± 0.15a 173.44 ± 8.22a 5,200.00 ± 260.34d 4,600.00 ± 1,098.99d 0.90 ± 0.70a 159.00 ± 4.84a
Catechin 18,155.56 ± 1,776.49b 37,511.11 ± 12,260.70c 562.22 ± 53.99a 594.44 ± 8.39a 11,311.11 ± 302.46b 17,066.67 ± 4,129.70b 36.79 ± 13.04a 1,377.78 ± 25.89a
Epicatechin 10,255.56 ± 851.36bc 37,433.33 ± 12,403.81d 175.44 ± 5.05a 225.22 ± 13.55a 7,111.11 ± 283.50ab 15,533.33 ± 3,926.55c 20.51 ± 10.62a 1,053.33 ± 58.97a
Quercetin 104.33 ± 3.79d 25.87 ± 9.68b 7.17 ± 0.34ab 19.19 ± 1.69ab 445.56 ± 21.43e 75.11 ± 16.08c 0.76 ± 0.06a 10.83 ± 0.23ab
Rutin 9.96 ± 1.67bc 13.26 ± 3.93cd 0.00 ± 0.00a 0.00 ± 0.00a 9.68 ± 1.52b 16.26 ± 2.95d 0.00 ± 0.00a 0.00 ± 0.00a
All value are expressed as Mean ± SD of triplicate determinations.
Different superscripts within the column are significantly different at p < 0.05 by Duncan’s multiple range test.
LOQ: limit of quantitation.