| Main functional groups | Ag-Stachytarpheta cayennensis |
| O-H Stretching | 3435 |
| C-H Stretching | 2922 |
| N-H Stretching | 2353 |
| Amide Stretching | 1622 |
| ?C?H Group bending | 1385 |
| Ring stretching, C-H in plane bending | 1024 |