ABSTRACT
Objective: To investigate the chemical constituents from the stems of Clausena emarginata. Methods: The compounds were isolated by macroporous resin, silica gel, ODS column chromatography, Sephadex LH-20, reversed-phase MPLC, and then purified by preparative HPLC. Their structures were determined by the analysis of ultraviolet spectrum, mass spectrum, and NMR spectrum. Neuroprotective activities of compounds 11 and 12 were initially investigated. Results: Sixteen compounds were isolated from the petroleum ether and acetone fractions of 95% ethanol extract of the stems of Cl. emarginata, and their structures were identified as 1H-Indole-3-carboxaldehyde (1), E-N-benzoiltiramine (2), dehydrodiconiferyl alcohol (3), tortoside A (4), zhebeiresinol (5), evofolin B (6), 2,3,5,4'-tetrahydroxystilbene-2-O-β-D-glucopyranoside (7), echipuroside A (8), 3-methylcarbazole (9), murrayafoline A (10), clausine Z (11), indizoline (12), clausenaline B (13), mafaicheenamine A (14), dictamnine (15), and honokiol (16). Conclusion: Compounds 1-8 are isolated from the plants of genus Clausena L. for the first time, compounds 1-16 are isolated from this plant for the first time. Compounds 11 and 12 show the neuroprotective activity against rotenone induced PC12 cell damage.
ABSTRACT
With the kernel of efficacy, "Xiaohe Silian" was a pattern and method for new drug discovery which was constituted with "metabolism-efficacy, toxicity-efficacy, quality-efficacy and structure-efficacy". Its connotation was in keeping with traditional Chinese medicine (TCM) clinical pharmacy. This paper systematically summarized the research method of new drug discovery practice process for TCM. To avoid western drug like in TCM new drug discovery, we carried out combination analysis with TCM clinical pharmacy. The correlation analysis between basic elements of "Xiaohe Silian(n) and TCM clinical pharmacy was studied to guarantee this method could integrate closely with TCM clinic from all angles. Hence, this method aimed to provide a new method for TCM new drug discovery on the basis of TCM clinical pharmacy with insisting on holistic view of multicomponent study, kinetic view of metabolic process when the curative effect occurred and molecular material view of quality control and structure-activity exposition.