黑沙蒿和鳳尾茶中二氫黃酮類化合物及其抗自由基活性研究.pdf

1、河南大學(xué)碩士學(xué)位論文黑沙蒿和鳳尾茶中二氫黃酮類化合物及其抗自由基活性研究姓名：楊玉霞申請學(xué)位級別：碩士專業(yè)：分析化學(xué)指導(dǎo)教師：趙東保劉繡華20050501擅要ABSTRACTInthispapersixflavanoneswereisolatedfromArtemisiaOrdosicaKraschen(Compositae)andElsholtziaBodinieriVaniot(Labiatae)Thefreeradicalscav

2、engingactivitiesofthemweEestudiedandcomparedwithflavonoidsbyspectrophotometricmethodThestructure—activityrelationships(SARlweresummarizedIsolationandstructuralelucidationofthesecompoundswerebrieflyintroducedTwocrystalsof

3、547一dihydroxy一7一methoxyflavanoneisolatedfromArtemisiaOrdosicaKraschenwerestudiedbyX—raydiffractioncrystallogralc)llyThemaincontentsareasf01lows：1ReviewondevelopmentofnaturalflavanonesTheresearchofflavanoneswassummarizedi

4、nrecenttenyears，includingisolation、extraction、structuralelucidation、determination、activityandsynthesis2IsolationandstrncturalelucidationofflavanonesinAOrdosicaKraschen＆EBodinieriVaniotThechemicalconstituentsofAOrdosicaKr

5、aschenandEBodinieriVaniotwereInvestigatedsystemicallySixflavanoneswereisolatedandtheirstructureswereelucidatedbyUV、IR、MS、NMRandchemicalmethodsThesecompoundswere5hydroxy7，4’bimethoxyflavanone(I)、54，_dihydroxy一7一methoxyfla

6、vanone(II)、53’，4“tfihydroxy一7一methoxyflavanone(III)、35，7一trihydroxy一4“methoxyflavanone(IV)、57一dihydroxy4’methoxyflavanone(V)and53’，47trihydroxyflavanone一7—0glycoside(Ⅵ)Twocrystalsof547dihydroxy7methoxyflavanonewereacquir