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  5. ent-Kaurene衍生物之合成與活性評估
 
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ent-Kaurene衍生物之合成與活性評估

Other Title
Synthesis and biological evaluation of ent-kaurene derivatives
Type
thesis
Date Issued
2015-07-09
Author(s)
蘇達騏
Advisor
林淑娟
Subjects
系所名稱:藥學系(碩博士班)
Description
學位別:碩士
語文別:中文
指導教授:林淑娟
共同指導教授:
口試委員:陳國棟;張淑芬
中文關鍵字:steviol
英文關鍵字:菊糖醇
Abstract
中文摘要
Stevioside為天然的甜味劑,可由菊糖(Stevia rebaudiana Bertoni Bertoni)的葉子萃取而得。Stevioside具有降血壓、降血糖、抗發炎、抗癌及免疫調節等功能。就化學觀點及藥物發現,stevioside及其相關化合物具有高度的研究價值。Steviol及isosteviol皆為由stevioside衍生而得的四環雙萜化合物,具有多種生物活性,然而結構骨架卻不相同。Steviol為ent-kaurene雙萜,而isosteviol則是ent-beyerane雙萜。過去本實驗室以isosteviol為起始物,合成C4-amide及C4-ureido的衍生物,部分合成的衍生物具有抗B肝病毒的活性。由於steviol與isosteviol結構類似,以及為繼續尋找具新標的及作用機轉的抗B型肝炎病毒的化合物,許多具不同官能基取代於steviol C-4羧基的衍生物已被合成,所得化合物皆經由核磁共振光譜及高解析質譜鑑定其結構。初步抗B肝病毒活性測試發現,化合物 5具有比對照化合物lamivudine好的抑制病毒DNA 複製的活性;而化合物20、31、33和34亦具不錯的抑制病毒DNA 複製的活性,但比對照化合物lamivudine弱。
URI
https://203.71.86.71/handle/123456789/57335

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