Table 1. Extraction yield, and the contents of gallic acid, and kaempferol of E. umbellata leaf extract by solvent concentration, temperature and time
| Extraction condition | Extraction yield (%) | Gallic acid (μg/mg) | Kaempferol (μg/mg) |
| EtOH (%) | Temperature (°C) | Time (h) |
| 0 | 20 | 6 | 10.87 | 18.11 | 0 |
| 20 | 20 | 6 | 10.86 | 20.70 | 0.23 |
| 50 | 20 | 6 | 8.61 | 22.49 | 0.21 |
| 70 | 20 | 6 | 8.07 | 26.87 | 0.80 |
| 70 | 60 | 6 | 14.77 | 29.83 | 0.92 |
| 70 | 80 | 6 | 16.83 | 45.60 | 1.16 |
| 70 | 80 | 3 | 14.33 | 29.45 | 1.04 |
| 70 | 80 | 12 | 14.82 | 37.39 | 1.01 |
| 70 | 80 | 24 | 14.35 | 37.56 | 1.10 |
| 70 | 80 | 48 | 11.58 | 30.05 | 1.14 |