kratom leaf (mitragyna speciosa), a plant of the madder family used as a habitforming drug

alternative aminopyrin anonymous aromatic asia asteraceae bia biak camphor delta depressant diabetes dope drug fresh green habitforming heal herb herbal hydroxy isolated korth kratom leaf leaves madder medicinal medicine menthol mitragyna mitragynine morphine nature neithum nerve opioid oxindole pharmaceutical pharmacology phytosterol plant psilocybin receptor rubiaceae speciosa stimulation thailand therapy tree