Chemical constituents from ethanol extract of Polyalthia rumphii branches and their cytotoxicity evaluation
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چکیده
منابع مشابه
Anticancer activities of constituents from the stem of Polyalthia rumphii.
Nine known compounds were firstly isolated from the chloroform extract of Polyalthia rumphii stem by anticancer activity guidance, and the chemical structures were identified by using spectroscopic and physico-chemical analysis. Cytotoxic evaluation against four cancer cell lines was performed on all these compounds, which showed that K562 could be significantly inhibited by partial compounds w...
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Bioassay-guided investigation of the branches of Cleyera japonica led to the isolation of four phenolic constituents: 3,3’-di-O-methylellagic acid (1), 3,3’-di-O-methylellagic acid 4’-O-β-D-xylofuranoside (2), 3,5,7-trihydroxychromone 3-O-α-L-arabinofuranoside (3) and aviculin (4). Their structures were elucidated on the basis of spectral studies, as well as by comparison with literature data. ...
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آنزیم تریپسین در شرایط قلیایی ناپایدار می باشد .و فعالیت پروتئولیتیکی تریپسین منجربه خود هضمی آن در جایگاههای خاصی می گردد. بنابر این آنزیمی با ناپایداری بالا محسوب میگردد. در سالهای اخیر موفق شدند که با ایجاد تغیرات شیمیایی با اضافه کردن فلزات خاص ، کلسیم و یا عمل استیلاسیون منجر به افزایش پایداری آنزیم تریپسین گردند. مطالعات در حال حاضر نشان می دهد که تریپسین استیله شده فعالیت آنزیمی خود را ...
15 صفحه اولIsolation and Cytotoxicity Evaluation of the Chemical Constituents from Cephalantheropsis gracilis
Cephalantheropsis gracilis afforded five new compounds: cephalanthrin-A (1), cephalanthrin-B (2), cephathrene-A (3), cephathrene-B (4), methyl 2-(aminocarbonyl) phenylcarbamate (5), and 52 known compounds. The structures of the new compounds were determined by spectroscopic analysis. Among the compounds isolated, tryptanthrin (6), phaitanthrin A (7), cephalinone D (19), and flavanthrin (30) sho...
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ژورنال
عنوان ژورنال: Revista Brasileira de Farmacognosia
سال: 2018
ISSN: 0102-695X
DOI: 10.1016/j.bjp.2018.03.004