藏药五脉绿绒蒿中的生物碱藏药五脉绿绒蒿中的生物碱

目的 研究藏药五脉绿绒蒿（Meconopsis quintuplinervia Regel）的化学成分。方法 用多种色谱技术进行分离纯化，用IR, MS, 1D-和2D-NMR鉴定化合物结构。结果 从95%乙醇提取物中分离出3个生物碱，分别鉴定为去甲血根碱（norsanguinarine，I）、O-甲基淡黄巴豆亭碱（O-methylflavinantine，II）和五脉绿绒蒿碱（meconoquintupline，III）。结论 化合物III为新化合物。

Alkaloids from a Tibetan medicine Meconopsis quintuplinervia Regel

AIM: To reinvestigate the chemical constituents of the ethanolic extract of Meconopsis quintuplinervia Regel which is a traditional Tibetan medicine used for treatments of hepatitis, tuberculosis etc.. METHODS: The compounds were enriched by column chromatography techniques over silica gel, macro porous resin and Sephadex LH-20 absorbents, and finally purified by reverse phase preparative HPLC methods with isocratic mobile phase systems of methanol-H2O-acetic acid (500:500:1) and acetonitrile-H2O-acetic acid (200:800:1). Structural determination of the pure compounds were based on extensive analyses of modern spectroscopic methods including IR, MS, HRMS, 1D- and 2D-NMR spectra. RESULTS: Three alkaloids were obtained and their structures were elucidated as norsanguinarine (I), O-methylflavinantine (II) and 6-methoxy-17-methyl-2, 3-[methylenebis (oxy)]-morphin-5-en-7-one (III). CONCLUSION: Norsanguinarine (I) was isolated from genus Meconopsis for the first time, and 6-methoxy-17-methyl-2,3-[methylenebis(oxy)]-morphin-5-en-7-one (III) is a new alkaloid named as meconoquintupline.