The new alkaloid foliphorin is isolated from Haplophyllum foliosum (Rutaceac). Spectral data establish rile structure as 1-methyl-4-methoxy-8(2'-O-acetyl-3'-hydroxy-3'-methylbutyloxy)-2-quinolone. Dihydrohaplamine. which is observed for the first time in nature, is obtained from Haplophyllum perforatum.