Tags: Chemical Compound, Chemical Substance.
Mesembrenone is an alkaloid constituent of Sceletium tortuosum (Kanna). Similar to modern synthetic antidepressants it is a potent (IC50 < 1 μM) selective inhibitor of the serotonin transporter (SERT) (that is a selective serotonin reuptake inhibitor; Ki = 27 nM) and also a phosphodiesterase 4 (PDE4) inhibitor (Ki = 470 nM).