The new pungent principles, γ-sanshool and hydroxy γ-sanshool, were isolated from the pericarps of Zanthoxylum ailanthoides SIEB. et ZUCC. Their structures were determined as (2E, 4E, 8Z, 10E, 12E)-N-isobutyl-2, 4, 8, 10, 12-tetradecapentaenamide and (2E, 4E, 8Z, 10E, 12E)-2'-hydroxy-N-isobutyl-2, 4, 8, 10, 12-tetradecapentaenamide by chemical and spectroscopic evidences.
