Table 4.
Phenolic acid contents expressed in μg per 1 g of dry weight of extracts. Mean values of three replicate assays with standard deviation.
| Phenolic acid | E. gracilistylus | E. divaricatus∗ | E. senticosus∗ | E. henryi∗ | E. sessiliflorus∗ |
|---|---|---|---|---|---|
| Protocatechuic acid | 446 ± 1 | 435.5 ± 5.5 | 838 ± 12 | 1865 ± 35 | 529 ± 1 |
| Salicylic acid | <LOQ | 30.6 ± 0.2 | 16.8 ± 1 | <LOQ | 41.4 ± 2.6 |
| Caffeic acid | nd | 49 ± 0.3 | 135.5 ± 3.5 | 244 ± 2 | 49.1 ± 0.3 |
| p-Coumaric acid | 30.6 ± 0.95 | 12.35 ± 0.12 | 23.6 ± 0.3 | 55 ± 0.2 | <LOQ |
| Ferulic acid | 64.6 ± 3 | 46.6 ± 3 | 43.9 ± 2.4 | 55 ± 1.8 | 11 ± 0.3 |
nd: not detected.