目的对山楂(Crataegus pinnatifida Bge.)核中的化学成分进行研究。方法运用硅胶﹑Seph-adex LH-20、ODS柱色谱,制备HPLC,重结晶等分......

A series of copolymers comprising butylmethacrylate, styrene, butylacrylate, hydroxypropyl acrylate and perfluoroalkyl m......