104669-02-5Relevant articles and documents
Benzophenone C - And O -glucosides from Cyclopia genistoides (Honeybush) inhibit mammalian α-glucosidase
Beelders, Theresa,Brand, D. Jacobus,De Beer, Dalene,Malherbe, Christiaan J.,Mazibuko, Sithandiwe E.,Muller, Christo J. F.,Joubert, Elizabeth
, p. 2694 - 2699 (2014)
An enriched fraction of an aqueous extract prepared from the aerial parts of Cyclopia genistoides Vent. yielded a new benzophenone di-C,O-glucoside, 3-C-β-d-glucopyranosyl-4-O-β-d-glucopyranosyliriflophenone (1), together with small quantities of a known benzophenone C-glucoside, 3-C-β-d-glucopyranosylmaclurin (2). The isolated compounds showed α-glucosidase inhibitory activity against an enzyme mixture extracted from rat intestinal acetone powder. Compound 2 exhibited significantly (p 0.05) higher inhibitory activity (54%) than 1 (43%) at 200 μM. In vitro tests in several cell models showed that 1 and its 3-C-monoglucosylated derivative (3-C-β-d-glucopyranosyliriflophenone) were marginally effective (p ≥ 0.05) in increasing glucose uptake.
Tannins and Related Compounds. XXI. Isolation and Characterization of Galloyl and p-Hydroxybenzoyl Esters of Benzophenone and Xanthone C-glucosides from Mangifera indica L.
Tanaka, Takashi,Sueyasu, Tokiko,Nonaka, Gen-ichiro,Nishioka, Itsuo
, p. 2676 - 2686 (2007/10/02)
Six new galloyl and p-hydroxybenzoyl esters (2-7) of benzophenone C-glucosides have been isolated, together with a new benzophenone C-glucoside (1), from the leaves of Mangifera indica L. (Anacardiaceae).On the basis of chemical and spectroscopic evidence, the structures of these compounds have been established as maclurin 3-C-β-D-glucoside (1), maclurin 3-C-(6''-O-p-hydroxybenzoyl)-β-D-glucoside (2), maclurin 3-C-(2''-O-galloyl-6''-O-p-hydroxybenzoyl)-β-D-glucoside (3), maclurin 3-C-(2''-O-p-hydroxybenzoyl-6''-O-galloyl)-β-D-glucoside (4), maclurin 3-C-(2'',3'',6''-tri-O-galloyl)-β-D-glucoside (5), iriflophenone 3-C(2'',6''-di-O-galloyl)-β-D-glucoside (6) and iriflophenone 3-C-(2'',3'',6''-tri-O-galloyl)-β-D-glucoside (7). (-)-Epicatechin 3-O-gallate (9), mangiferin (10), isomangiferin (11) and a new xanthone C-glucoside gallate, mangiferin 6'-O-gallate (8), have also been isolated and their structures have been similarly characterized.Furthermore, the above plant source contained polygalloylglucoses which were characterized on the basis of chemical and high performance liquid chromatographic analyses as a mixture of penta- to undecagalloylglucoses based on a 1,2,3,4,6-penta-O-galloyl-β-D-glucose core.Maclurin 3-C-glucoside (1) has been transformed enzymatically to mangiferin (10) and isomangiferin (11), and it has become clear that 1 is a key intermediate in the biosynthesis of 10 and 11. Keywords - Mangifera indica; Anacardiaceae; galloyl maclurin 3-C-glucoside p-hydroxybenzoate; galloyl iriflopenone 3-C-glucoside; galloyl mangiferin; benzophenone C-glucoside; biosynthesys; mangiferin; isomangiferin; galloylglucose