Aging time (months)

0

1

2

3

4

5

6

Compounds

Gallic acid

ND

0.326 ± 0.006

0.405 ± 0.004

0.510 ± 0.006

0.646 ± 0.006

0.829 ± 0.002

1.007 ± 0.008

Catechin

ND

Vanillic acid

ND

1.095 ± 0.009^**

2.975 ± 0.006^**

4.089 ± 0.004^**

4.741 ± 0.007^**

5.451± 0.050^**

6.101 ± 0.009^**

Phenol

ND

0.112 ± 0.004

0.226 ± 0.003

0.255 ± 0.012

0.333 ± 0.001

0.389 ± 0.014

0.451 ± 0.002

Syringic acid

ND

0.869 ± 0.011

0.789 ± 0.002

0.790 ± 0.002

0.846 ± 0.001

0.921 ± 0.007

0.988 ± 0.016

Vanillin

ND

0.098 ± 0.001

0.090 ± 0.006

0.084 ± 0.003

0.081 ± 0.001

0.103 ± 0.003

0.113 ± 0.002

Syringaldehyde

ND

0.805 ± 0.004

0.744 ± 0.002

0.806 ± 0.005

0.927 ± 0.005

1.092 ± 0.002

1.304 ± 0.006

p-Coumaric acid

ND

0.119 ± 0.007

0.147 ± 0.001

0.166 ± 0.001

0.183 ± 0.023

0.350 ± 0.001

0.393 ± 0.003

Sinapic acid

ND

0.255 ± 0.001

0.634 ± 0.004

0.881 ± 0.003

0.947 ± 0.052

1.088 ± 0.015

1.206 ± 0.040

Coumarin

ND

4-Methylumbelliferone

ND

0.254 ± 0.015

0.334 ± 0.012

0.503 ± 0.005

0.511 ± 0.019

o-Coumaric acid

ND

0.145 ± 0.015

0.167 ± 0.003

0.172 ± 0.006

0.173 ± 0.001

0.180 ± 0.007

Sum of each phenolic compound (on each month)

ND

3.679

6.155

8.002

9.210

10.899

12.324