Chemical studies on the constituents of Polygonum nodosum.
نویسندگان
چکیده
منابع مشابه
Studies on the Chemical Constituents of
Azadirachta indica A. Juss (Meliaceae) is indige nous to the Indo-Pakistan subcontinent and its various parts are reputed as therapeutic agents [2, 3]. Some of the constituents of neem have recently been shown to possess significant pesticidal activity [4]. More recent studies undertaken on the fresh, un dried, uncrushed, ripe and unripe, fruits and the un dried leaves of the plant by Siddiq...
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Two lignan sulfates, a stilbene derivative and a phenol sulfate, together with 10 known compounds, were isolated from an aqueous extract of the root of Polygonum cuspidatum. The new compounds were elucidated based on chemical evidence and spectroscopic techniques including two-dimensional NMR methods. They exhibited no inhibition of lipid peroxidation and no cytotoxic and DNA cleavage activities.
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Phytochemical investigations on the methanolic extract of Thymus serpyllum resulted in the isolation of 2 new compounds, 3-ketopentatriacontanoic acid (1) and 27-ketotriacontanol (2). The extract also afforded 3 known compounds, 3 β-hydroxyolean-12-en-28-oic acid (3), 3-O-β-D-glucopyranosyl-sitosterol (4), and dihydroursonic acid (5), detected for the first time from Thymus serpyllum. The struc...
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قاعده مقتضی و مانع در متون فقهی کم و بیش مستند احکام قرار گرفته و مورد مناقشه فقهاء و اصولیین می باشد و مشهور معتقند مقتضی و مانع، قاعده نیست بلکه یکی از مسائل ذیل استصحاب است لذا نگارنده بر آن شد تا پیرامون این قاعده پژوهش جامعی انجام دهد. به عقیده ما مقتضی دارای حیثیت مستقلی است و هر گاه می گوییم مقتضی احراز شد یعنی با ماهیت مستقل خودش محرز گشته و قطعا اقتضاء خود را خواهد داشت مانند نکاح که ...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1982
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.30.1602