Table 1.
High-pressure liquid chromatography equipped with diode array detector (HPLC-DAD) summary results of each peak.
| Peak No. | Compound Name | Retention Time | ʎmax (nm) | Concentration mg/100 g DW |
|---|---|---|---|---|
| 1 | Gallic acid (GA) | 4.4 | 271.2, 214.6 | 117.6 ± 1.5 |
| 2 | Trihydroxybenzoic (TBHA) acid | 7.3 | 260.5, 221.4 | 112.6 ± 5.6 |
| 3 | Protochateuic acid (PTA) | 13.4 | 291.4, 260.5, 214.4 | 103.8 ± 2.4 |
| 4 | Ferulic acid (FA) | 14.1 | 323.7, 236.8 | 168.4 ± 1.8 |
| 5 | Protocatechualdehyde (PTCA) | 15.0 | 308.2, 279.5, 229.7 | 98.4 ± 2.3 |
| 6 | p-coumaric acid (PCA) | 18.4 | 309.4, 229.7 | 256.7 ± 6.8 |
| 7 | Vanillic acid (VN) | 19.7 | 279.5, 246.4 | 57.9 ± 2.4 |
| 8 | Protocatechualdehyde (PhA) | 22.2 | 280.6, 224.3 | 116.8 ± 1.9 |
| 9 | Vaniline (VNA) | 23.6 | 87.5 ± 2.4 | |
| 10 | Apigenic acid (APG) | 26.9 | 294.6, 261.7, 219.8 | 117.7 ± 3.6 |
| 13 | Syringic acid (peak 13) | 27.2 | 310.5, 222.5 | 95.6 ± 11.3 |
| 14 | p-hydroxybenzoic acid (PHBA) | 28.1 | 328.5, 234.4 | 113.7 ± 3.8 |