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Overview of PA content extracted with two different extraction procedures from Petasites. The results correspond to the sum of petasitenine, neopetasitenine, senkirkine, and otosenine [55].
| Technique | Sample (g) |
Volume (mL) | Time (h) | Temperature (°C) | Solvent | Result (ratio) | |
|---|---|---|---|---|---|---|---|
| 1 | Soxhlet | 10 | -- | 24 | Bp. | Ethanol | 1.0 |
| 2 | Boiling | 10 | 300 | 1 | Bp. | Water | 0.5 |
