4,5-Dimethoxycanthin-6-one
4,5-Dimethoxycanthin-6-one is a potent and uncompetitive inhibitor of CYP1A2-mediated phenacetin O-deethylation with an IC50 value of 1.7μM and a Ki value of 2.6 μM. 4,5-Dimethoxycanthin-6-one, as an alkaloid, is isolated from the wood of Picrasma quassioides BENNET (Simaroubaceae)[1][2].