Chemical constituents from the seeds of Zanthoxylum alatum

Chemical studies on the seeds of Zanthoxylum alatum Roxb. (Rutaceae) led to the isolation of two new phenolic constituents characterized as 3-methoxy-11-hydroxy-6,8-dimethylcarboxylate biphenyl (3) and 3,5,6,7-tetrahydroxy-3′,4′-dimethoxyflavone-5-β-d-xylopyranoside (6), along with the five known compounds, 1-methoxy-1,6,3-anthraquinone, 1-hydroxy-6,13-anthraquinone, 2-hydroxybenzoic acid, 2-hydroxy-4-methoxy benzoic acid, and stigmasta-5-en-3β-d-glucopyranoside, on the basis of spectral data and chemical analyses.