Mitraphylline, an oxindole derivative, is an active alkaloid in the leaves of the tree Mitragyna speciosa, commonly known as kratom. As a non-narcotic constituent, it also occurs in the bark of Uncaria tomentosa (cat's claw) along with isomeric alkaloids.
Mitraphylline, an oxindole derivative, is an active alkaloid in the leaves of the tree Mitragyna speciosa, commonly known as kratom. As a non-narcotic constituent, it also occurs in the bark of Uncaria tomentosa (cat's claw) along with isomeric alkaloids.
Source: Wikipedia "Mitraphylline" · CC BY-SA 4.0
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