TABLE 1.
The absolute configurations of mitragynine (1) and its diastereomers.
| Compound | C-3 | C-15 | C-20 |
|---|---|---|---|
| Mitragynine (1) | S | S | S |
| Speciogynine (2) | S | S | R |
| Speciociliatine (3) | R | S | S |
| Mitraciliatine (4) | R | S | R |
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