Tannins and Related Polyphenols of Lythraceous Plants. III. Hydrolyzable Tannin Oligomers with Macrocyclic Structures, and Accompanying Tannins from Woodfordia fruticosa Kurz.
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چکیده
منابع مشابه
Tannins of Constant Structure in Medicinal and Food Plants—Hydrolyzable Tannins and Polyphenols Related to Tannins
In addition to the commonly used classification as hydrolyzable tannins and condensed tannins, tannins can also be categorized into two other types: polyphenols of constant chemical structure (Type A) and polyphenols of variable composition (Type B). Both types of tannins and related polyphenols account for a large part of plant polyphenols, but accurate structure-activity correlations on a mol...
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Three hydrolyzable tannins, nobotannins L, M and N, were isolated from the water-soluble portion of the leaf extract of Tibouchina semidecandra, and their trimeric structures were elucidated from spectral and chemical evidence. Nobotanins L and N exist as equilibrium mixtures of four anomers due to the presence of two unacylated anomeric centers.
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Woodfordia fruticosa is locally known as Dhawai, belonging to the Lythraceae family. Woodfordia fruticosa is an important medicinal plant of tropical and subtropical India. It has wide range of medicinal and pharmacological application. It is commonly used in the treatment of various diseases like diarrhea, dysentery, fever, headache, hemorrhoids, herpes, internal hemorrhage, leucorrhoea, liver...
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Proanthocyanidins (PA) (condensed tannins) and hydrolyzable tannins (HT) are the two major classes of tannins. Proanthocyanidins are flavonoid polymers. Hydrolyzable tannins are polymers of gallic or ellagic acid esterified to a core molecule, commonly glucose or a polyphenol such as catechin. Proanthocyanidins are the most common type of tannin found in forage legumes. Problems in the analysis...
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Woodfordia fruticosa dried flower (WF-EE). WF-EE exhibited significant and dose dependent bronchoprotective, bronchodilatory and antiinflammatory effect. WF-EE at 200 mg/kg prolonged the latent period and exhibited protection against experimental asthma induced by the combination of histamine and acetylcholine aerosol in guinea pigs. WF-EE (1 mg/ml) exhibited 100 % bronchodilation (complete bro...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1992
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.40.2023