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Quantitation of three diterpenes in commercial preparations. Concentrations given in µg·mL−1 ± SD.
| Diterpene | A | B | C | D |
|---|---|---|---|---|
| 1 | 176.7 ± 12 | 138.8 ± 0.2 | 82.0 ± 0.1 | 127.3 ± 0.3 |
| 2 | 95.5 ± 0.7 | 136.9 ± 3.6 | 96.1 ± 2.1 | 51.3 ± 0.3 |
| 3 | 18.3 ± 0.7 | 13.4 ± 0.4 | 26.4 ± 0.4 | 9.8 ± 0.3 |
