Antiallergic Properties of Biflavonoids Isolated from the Flowers of Mesua ferrea Linn. was written by Manse, Yoshiaki;Sakamoto, Yusuke;Miyachi, Taiki;Nire, Mitsuyo;Hashimoto, Yoshinori;Chaipech, Saowanee;Pongpiriyadacha, Yutana;Morikawa, Toshio. And the article was included in Separations in 2022.Recommanded Product: 2-(3-(3,4-Dimethoxyphenyl)acrylamido)benzoic acid This article mentions the following:
The methanolic extract from the flowers of Mesua ferrea Linn. (Calophyllaceae) showed significant hyaluronidase inhibitory activity. Following a bioassay-guided separation of the extract, two biflavonoids, viz., mesuaferrone-A (1) and mesuaferrone-B (2), were isolated, along with ten flavonoids (3-12), two xanthones (13 and 14), three triterpenes (15-17), a phenylpropanoid (18), and five aromatics (19-24). Among the isolates, 1 and 2 (IC50 = 51.1μM and 54.7μM, resp.) exhibited hyaluronidase inhibitory activity equivalent to that of the com. available antiallergic agents disodium cromoglycate (64.8μM) and ketotifen fumarate (76.5μM). These biflavonoids (1 and 2) are 8-8″ linked dimers that are composed of naringenin (1a) or apigenin (3), with their corresponding monomers lacking inhibitory activity (IC50 > 300μM). In addition, 1 and 2 (IC50 = 49.4μM and 49.2μM, resp.) inhibited the release of β-hexosaminidase, which is a marker of antigen-IgE-mediated degranulation, in rat basophilic leukemia (RBL-2H3) cells. These inhibitory activities were more potent than those of the antiallergic agents tranilast and ketotifen fumarate (IC50 = 282μM and 158μM, resp.), as well as one of the corresponding monomers (1a; IC50 > 100μM). Nonetheless, these effects were weaker than those of the other monomer (3; IC50 = 6.1μM). In the experiment, the researchers used many compounds, for example, 2-(3-(3,4-Dimethoxyphenyl)acrylamido)benzoic acid (cas: 53902-12-8Recommanded Product: 2-(3-(3,4-Dimethoxyphenyl)acrylamido)benzoic acid).
2-(3-(3,4-Dimethoxyphenyl)acrylamido)benzoic acid (cas: 53902-12-8) belongs to amides. Amides are pervasive in nature and technology. Proteins and important plastics like Nylons, Aramid, Twaron, and Kevlar are polymers whose units are connected by amide groups (polyamides); these linkages are easily formed, confer structural rigidity, and resist hydrolysis. Amides are not in general accessible by the direct condensation of amines with carboxylic acids for two reasons: first, both components are readily deactivated by a transfer of a proton from the acid to the amine and second, the hydroxy unit on the carbonyl of the acid is a relatively poor leaving group. Nevertheless, the formation of five- and six-membered rings is often surprisingly simple provided that other factors can be brought into play to assist in the condensation.Recommanded Product: 2-(3-(3,4-Dimethoxyphenyl)acrylamido)benzoic acid
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