| Comp. No. | % Inhibition of cathepsin B |
| 3a | 38.8 |
| 3c | 10.0 |
| 4 | 48.8 |
| 5a | 52.2 |
| 5b | 57.62 |
| 6 | 40.8 |
| 7a | 56.3 |
| 7b | 41.7 |
| 11a | 54.6 |
| 11b | 22.2 |
| 11c | 42.7 |
| 12a | 59 |
| 12b | 37 |
| 13 | 22.6 |
| 17 | 82.3 |
| 18 | 26.5 |
| 20 | 18.9 |
| Doxorubicin | 18.7 |