杜仲(Eucommia ulmoides Oliv.)是一种重要的中药材,由于分布区域有限,加上只有达15年生长期的树皮才可供药用,故价格昂贵。日本富山医科药科大学将在日本长野县载培的杜仲茎,用沸甲醇提取,经树脂柱,硅胶柱层析等手段,从中分离出十种成分:5-羟基-2-呋喃甲醛(1),杜仲醇(2),1-去氧杜 Eucommia ulmoides Oliv. is an important Chinese herbal medicine. Due to the limited distribution area and the fact that only the bark of 15 years of growth is available for medicinal purposes, it is expensive. Japan’s Toyama Medical and Pharmaceutical University will sap the stem of eucommia ulmoides from Nagano Prefecture in Japan, extract it with boiling methanol, and separate ten components: 5-hydroxy-2-furaldehyde from a resin column and silica gel column chromatography. ), Eucommia alcohol (2), 1-deoxydo