Quantitative analysis of 7-hydroxymitragynine in commercial kratom products and its stability under chemical and physiological conditions
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7-Hydroxymitragynine (7-OH), a minor alkaloid in kratom (Mitragyna speciosa (Korth.) Havil.) (Rubiaceae) and an active metabolite of mitragynine, is a critical transient precursor to mitragynine pseudoindoxyl, which exhibits >2-fold μ-opioid receptor-biased a... ...