Twelve benzene derivatives from Clausena excavata / 药学学报

A new phenethanol, (2'R)-4-(2', 3'-dihydroxy-3'-methyl-butanoxy)-phenethanol (1), along with other eleven known benzene derivatives (2-12) were isolated from the roots, stems and leaves of Clausena excavata (Rutaceae). Compounds 3 and 4 are new natural products, and compounds 5-8, 10-12 were isolated from C. excavata for the first time. Their structures were elucidated on the basis of MS, 1D and 2D NMR spectroscopic analyses including HSQC, COSY and HMBC experiments. 1 was tested for its cytotoxicities against A549, HeLa and BGC-823 cancer cell lines, and antimicrobial activities against Candida albicans and Staphylococcus aureus. The results showed that 1 did not exhibit cytotoxic and antimicrobial activities.

Effect of Zingiber offiicinale and Aconitum cainichaeli before and after compatibility on contents of four gingerols / 中国中药杂志

<p><b>OBJECTIVE</b>To discuss the synergistic mechanism of compatible use of two medicinal herbs, Zingiber offiicinale and Aconitum cainichaeli, by determining single decoction of Z. offiicinale and four gingerols (6-gingerol, 8-gingerol, 6-shogaol, 10-gingerol) contained in compound decoction of Z. offiicinale and A. cainichaeli of different compatibility ratio using HPLC.</p><p><b>METHOD</b>Kromasil-C18 column (4.6 mm x 250 mm, 5 microm) was adopted. The mobile phase was acetonitrile (B) and 0.1% aqueous acetic acid (A) for gradient elution (0-30 min, 40%-90% B; 30-35 min, 90%-40% B). The flow rate was 1.0 mL x min(-1). The detection wavelength was set at 275 nm. The column temperature was 30 degrees C.</p><p><b>RESULT</b>The four gingerols were in baseline separation, with a good linearity (r > 0.999), an average recovery of 100.9% -103.5% and RSD < 3.0%. Compared with the single decoction of Z. offiicinale, the content of gingerols in the compound decoction of Z. offiicinale and A. cainichaeli was on the rise and in direct proportion with the increase in the volume of A. cainichaeli.</p><p><b>CONCLUSION</b>The synergistic mechanism of the compatibility of Z. offiicinale and A. cainichaeli can be proved with the increased release of gingerols from Z. offiicinale.</p>

Variation regularity of chemical constituents contained in Euphorbia ebracteolata before and after roasting with vinegar / 中国中药杂志

<p><b>OBJECTIVE</b>To study the variation regularity of chemical constituents contained in Euphorbia ebracteolata after vinegar processing.</p><p><b>METHOD</b>The colorimetric method was adopted for determining the variation of total lactone content in toxic constituents contained in E. ebracteolata decoction, with Kedde as the coloring reagent. The HPLC method was used for detecting the content variation of jolkinolide B and jolkinolide C, both were active constituents contained in E. ebracteolata decoction, before and after roasting with vinegar, in which Kromasil-ODS column (4.6 mm x 250 mm, 5 microm) was adopted, with the detection wavelength of 290 nm, column temperature at 25 degrees C , gradient elution with acetonitrile and water and the flow rate of 1.0 mL x min(-1).</p><p><b>RESULT</b>After roasting with vinegar, the total lactone content in E. ebracteolata was reduced from 0.60 to 0.45 mg x g(-1) , with active constituents, jolkinolide B and jolkinolide C, increased to varying degrees. The established chromatographic fingerprint contained risk information and could reflect the overall variation regularity of chemical constituents after roasting with vinegar.</p><p><b>CONCLUSION</b>The chemical constituents of E. ebracteolata show significantly changes, especially a reduced toxicity, after roasting with vinegar. The increase in its efficacy may be related to the variation of these constituents.</p>