Table 3.
Composition of verbascosides and iridoids in each Harpagophytum tuber extract presented as mean value with standard deviation (SD) as mg per g dry weight of the plant material.
| Accession | Verbascoside | Isoverbascoside | Acetylacteoside | Pagoside | Harpagoside | 8-O-p-Coumaroyl-harpagide | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | |
| 3 | 3.04 | 0.11 | 21.75 | 1.16 | 4.49 | 0.16 | 0.11 | 0.01 | 4.09 | 0.34 | 0.04 | 0.00 |
| 11 | 1.28 | 0.11 | 6.02 | 0.50 | 3.30 | 0.45 | 0.68 | 0.08 | 9.08 | 0.97 | 4.04 | 0.41 |
| 14 | 4.22 | 0.33 | 15.62 | 1.32 | 1.29 | 0.15 | 0.48 | 0.05 | 7.07 | 0.60 | 3.29 | 0.35 |
| 16 | 0.64 | 0.09 | 2.47 | 0.27 | 0.84 | 0.03 | 0.17 | 0.01 | 0.96 | 0.15 | 0.07 | 0.01 |
| 17 | 0.33 | 0.05 | 0.62 | 0.08 | 0.23 | 0.03 | 0.02 | 0.00 | 1.71 | 0.24 | 0.09 | 0.01 |
| 24 | 0.39 | 0.08 | 0.64 | 0.14 | 0.41 | 0.11 | 0.00 | 0.00 | 0.16 | 0.01 | 0.01 | 0.00 |