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金銀花酚性成分之研究

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金銀花酚性成分之研究

中文摘要

忍冬(Lonlcera japonica Thunb.),屬忍冬科(Caprifoliaceae),為多年生藤本,花 初開為白色,後漸變金黃色,故又名金銀花,通常采五,六月未開之花豐陰乾, 秋冬可割取其藤,稱忍冬藤,商業部妝藥用。分布於中國大陸,日本,韓國。自 古以來,忍冬常用來治療感早風熱,惡瘡,腫毒,熱毒血痢。有清熱解毒宜散的 作用。根據近年來的研究,忍冬藥含 luteolfn-7-rhamnoglucoside,luteolin 等 flavonoid,花含 inositol,luteolin,saponins 及 phenolic sub-stances 等。

本研究的目的乃在探討金銀花中具有之免疫調節活性物質,分析有效成分之化學 構造,并評估其應用人價值,尋求新的藥用天然資源。因此,本實驗乃取忍冬之 乾燥花,在不同溶媒系統下利用各種 column chromatograp-hy 作一有系統之酚性 成分分析,目前所分離出十種化合物,經由 PMR,CMR data 之分析或化學反應, 判 定其構造為 proto-catechuic acid(Ⅰ),methyl caffeate(Ⅱ),chloro-genic

acid(Ⅲ),methyl chlorogenate(ⅠV),3,5-di-O-caffeoylquinicacid(V),methul 3, 5-di-O-caffeoulquinate(VⅠ),3,4-di-O-caffeoylquinicacid(VⅡ),methyl 3, 4-di-O-caffeoylquinate (VⅢ),Luteolin(ⅠX),Rutin(X)。初步之探討結果,其中 之 cylorogenic acid 具有相當強的免疫調節作用,如刺激脾強胞之增生及促進骨 髓顆粒球及巨噬細胞群之分裂增殖,至於其他成分之藥理活性,目前尚在探討之 中。

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