Description and Uses
A quaternary base present in Xanthoxylum planisplium, this alkaloid is isolated as the iodide hemihydrate, m.p. 148-9°C (dec.); [α]21/sup>D + 71°(MeOH). Three methoxyl groups and a phenolic hydroxyl group are present, the O-methyl ether being characterized as the iodide, m.p. 225-7°C (dec.); [α]26/sup>D + 80° (EtOH).
Xanthoplanine, isolated from theroot of Xylopia parviflora, fully inhibits the EC50 ACh responses of both alpha7 and alpha4beta2 nACh receptors with estimated IC50 values of 9 μM (alpha7) and 5 μM (alpha4beta2)[1].
