Mitragynine pseudoindoxyl
Mitragynine pseudoindoxyl is a rearrangement product of 7-hydroxymitragynine, an active metabolite of mitragynine. Mitragynine pseudoindoxyl can be produced in the blood as a metabolite of 7-hydroxymitragynine.
Source: Wikipedia — Mitragynine pseudoindoxyl (CC BY-SA 4.0)