Characterization of stereostructure by X-ray and technology of extracting in combination hydrolysis in situ of acankoreanogenin from leaves of Acanthopanax gracilistylus W.W.Smith

To study the stereostructure by X-ray and the technology of extracting acankoreanogenin from the leaves of Acanthopanax graeilistylus W. W. Smith （AGS）, the crystal structure was measured with a Bruker APEX-Ⅱ area-detector diffractometer instrument and the technology of extracting in combination hydrolysis in situ （ECHS） was compared with these of traditional methods. The crystal belongs to the monoclinic system, space group P2b with unit cell parameters： a=（8.3652±0.0006） nm, b=（24.721±0.002） nm, and c=（14.5587±0.0011） nm, α=90°, β=97.850 （4） °, γ=90 °, V=2982.51 nm3, Dc= 1.179 mg/m3, and the molecular number （Z） of elementary structures was 2. The comparisons show that the extraction rate of acankoreanogenin with ECHS methods is much higher than that of traditional methods. Then, central composite design-response surface methodology （CCD-RSM） was adopted for optimizing the extraction rate of ECHS methods. The optimized values of extraction parameters are as follows： for the for extraction process of acid hydrolysis are that extraction time 110.8 min, solvent-herb ratio 11.5 and acid content 5.25%; the best extraction process of basic hydrolysis are that extract time 120 min, solvent-herb ratio 8.7 and the alkali content 8.79%. Finally, the extracts were purified with decolorizing carbon after alkali solution and acid-isolation and purity of acankoreanogenin was 98.7%.

细柱五加叶及其两种主要三萜成分的表面活性比较研究

目的为进一步开发利用细柱五加叶植物资源,对细柱五加叶及其主要三萜成分的表面活性进行了比较研究。方法在恒温条件下,采用最大泡压法测定五加苷A、五加苷元及细柱五加叶的不同质量浓度溶液的表面张力。结果五加苷A、五加苷元及细柱五加叶水煎液表面张力分别为63、70、50 mN/m2;而水在该温度下的表面张力是71 mN/m2。结论细柱五加叶水煎液的表面活性较五加苷A、五加苷元的表面活性好,是多种皂苷及其他成分贡献的结果。