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Direct Observation of Non-covalent Complexes for Phosphorylated Flavonoid-protein Interaction by ESI
XiaoLanCHEN TingZHANG HongXiaLIU LingBoQU YouZhuYU YuFenZHAO 《中国化学快报》2004,15(3):343-346
Diethyl flavon-7-yl phosphate was synthesized by modified Atheron-Todd reaction. The result of ESI shows that the phosphated flavonoids possess stronger binding affinities toward proteins such as myoglobin, insulin and lysozyme and are easier to form the non-covalent complexes with them. 相似文献
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LIMin-jing YOUJing-yan YAOShuang DINGLan LIUZhong-ying ZHANGHan-qi 《高等学校化学研究》2004,20(6):703-706
Three microwave-assisted extraction(MAE) procedures were studied. The first procedure was household microwave oven dynamic extraction(HMODE). The second procedure was special microwave oven bath extraction (SMOBE). The third procedure was microwave resonant cavity dynamic extraction (MRCDE). The results obtained by the three microwave-assisted extraction procedures were compared with those obtained by using traditional Soxhlet extraction. The results indicate that the MAE not only took a shorter time, but also simplified the procedure, and made the extraction a higher yield. At the same time the results obtained by the three MAE procedures were also compared with each other. 相似文献
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Jian CAO E TANG Xuan HUANG Lu Ling WU Xian HUANG 《中国化学快报》2006,17(7):857-858
In recent years, the solid-phase synthesis of small heterocyclic molecules has been a subject of intense research activity. Flavonoids are natural products from plants, which have been shown to elicit antitumoral, antiplatelet, antiischemic, antiallergic,… 相似文献
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Flavonoid triglycosides from the seeds of Camellia oleifera Abel 总被引:1,自引:0,他引:1
Two flavonoid triglycosides, kaempferol 3-O-{ β-D-glucopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→ 6)]-β-D-glucopyranoside} (1) and kaempferol 3-O-{ β-D-xylopyranosyl-(1 → 2)-[α-L-rhamnopyranosyl-(1→6)]-β-D-glucopyranoside } (2), were isolated from the seed of Camellia oleifera Abel. The absolute configuration of compound 1 was established on the basis of its X-ray analysis. Their cytotoxic activities and anti-HIV-RT activities were evaluated. 相似文献
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Jian Feng Liu Kang Ping Xu De Jian Jiang Fu Shuang Li Jian Shen Ying Jun Zhou Ping Sheng Xu Bin Tan Gui Shan Tan 《中国化学快报》2009,20(5):595-597
6-(2-Hydroxy-5-acetylphenyl)-apigenin (1),a new flavonoid with a phenyl substituent,was first isolated from Selaginella tamariscina.Its structure was elucidated on the basis of 1D and 2D NMR as well as ESI-HR-MS spectroscopic analysis. 相似文献
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PeiChengZHANG SuiXuXu 《中国化学快报》2002,13(4):337-340
Two new C-glucoside flavonoids,namely 8-C-β-D-(2″-O-acetyl) glucofuranosyl apigenin and 3″-O-acetylvitexin, were isolated from beaves of Crataegus pinnatifida Bge. var. major N.E.Br.Their structures were elucidated by the spectroscopic means and chemical evidence. 相似文献
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A new prenylated dihydroflavonoid was obtained from the root of Dolichos tenuicaulis (Baker) Craib. The structure was elucidated as (2S)-5,2',6'-trihydroxy-3'″, 8-di (γ,γ-dimethyl-allyl)-2'″, 2'″-dimethylpyrano-[5'″,6'″: 6,7]-2'″″,4'″″-cyclohexadiene-1 '″″-one-[2'″″,3'″″: 3',4']-flavanone, named dolichnin A, by spectroscopic methods including UV, IR, HR-EI-MS, 1D NMR and 2D NMR techniques, and subsequently, the anticancer activity of this compound to inhibit human cancer cells' growth including A549, BEL-7402, Hep-3B, SMMC7721, HT-29, MCF-7, SGC-7902, K562, A498 and PC3 cell lines by MTT method was evaluated in vitro. 相似文献