HPLC Fingerprint Analysis of Disporum Cantoniense / 医药导报

Objective To establish the HPLC fingerprint of Disporum cantoniense. Methods HPLC analysis was performed on Agilent Zorbax SB-C18 chromatographic column ( 250 mm × 4. 6 mm, 5 μm) with the mobile phase consisting of methanol-0.05% phosphoric acid in gradient mode.The flow rate was 1.0 mL·min-1, the detection wavelength was 256 nm and the column temperature was 30 ℃. Results The HPLC fingerprint of 15 batches of Disporum cantoniense was established. Thirteen common peaks in the fingerprint were demarcated, four of which were identified by reference substances. Chemical pattern recognition of fingerprint was performed by hierarchical cluster analysis and principal component analysis. Conclusion The method is simple, accurate and has a good repeatability, and can be used for quality control of Disporum cantoniense.

Determination of quercetin-3-O-alpha-L-arabinopyranoside in Periploca forrestii by RP-HPLC / 中国中药杂志

The aim of the paper was to develop a HPLC method for the quality control of Periploca forrestii Schltr. The 18 samples were analyzed on a Hypersil C18 column. The mobile phase was methanol-water (33:67) and the flow rate was 1 mL x min(-1). The detection wavelength was at 370 nm and column temperature was 25 degrees C. The linear relationship was good (r = 0.999 9) in the range of 0.204 4-2.044 microg for quercetin-3-O-alpha-L-arabinopyranoside. The average recovery was 97.78% (RSD 0.8%, n = 9). The contents of 18 samples varied from 0.171% to 0.264%. The method showed high precision, good repeatability and stability, so it can be used to assess the quality of P. forrestii.

Chemical constituents of Periploca forrestii / 中国中药杂志

<p><b>OBJECTIVE</b>To study the constituents of the stems of Periploca forrestii.</p><p><b>METHOD</b>The compounds were separated and purified by silica gel column chromatography, recrystallization and high-performance liquid chromatography. The structures were identified by various spectroscopic methods.</p><p><b>RESULT</b>Nine compounds were isolated and identified as 3-O-acetyloleanolic acid (1), 14-ursen-3-ol-1-one (2), taraxasterol (3), jacoumaric acid (4), periplogenin (5), 2alpha,3beta-dihydroxyursolic acid (6), E-p-hydroxy-cinnamic acid (7), caffeic acid (8), proanthocyanidin A2 (9).</p><p><b>CONCLUSION</b>All compounds except 6 were isolated from this plant for the first time, compound 4, 9 were obtained from the Periploca for the first time.</p>