| Contraction % | Extract concentration mg/L |
| 100 ± 8 | 200 |
| 100 ± 5 | 400 |
| 97 ± 4.9 | 600 |
| 89 ± 7 | 800 |
| 80 ± 8 | 1200 |
| 71 ± 6 | 2000 |
| 62 ± 5.5 | 4000 |
| 52 ± 7.8 | 6000 |
| 40 ± 6.5 | 8000 |
| 20 ± 5.9 | 10,000 |
| 0 ± 3 | 12,000 |