Chi Weigela, thuộc họ Kim ngân (Caprifoliaceae) được sử dụng rộng rãi trong y học cổ truyền tại các nước châu Á. Các hợp chất saponin phân lập từ chi Weigela có nhiều hoạt tính sinh mạnh như kháng oxy hóa, viêm và ung thư. Nghiên cứu đã tạo cao chiết ethanol loài florida “Jean’s Gold” bằng phương pháp xuất hỗ trợ vi sóng. Hai tách dựa trên sắc ký hiện đại. Cấu trúc hóa của này xác định là olean...

givotia rottleriformis has been used in the indigenous systems of medicine for the treatment of inflammatory diseases like rheumatism and psoriasis. in order to evaluate this information, antipsoriatic activity of three flavonoids isolated from the ethanol extract of the bark of givotia rottleriformis were investigated using in-vitro and in-vivo model, namely rutin (i), luteolin-7-o-β-d-glucuro...

Despite the traditional use of Solidago canadensis L. (Asteraceae) as a diuretic drug, there is a scarcity in scientific data concerning the activity of its different extracts and fractions as well as the class of constituents responsible for this diuretic action. A comparative study was carried out for the diuretic activities of the different standardized extracts and fractions of the...

We investigated bluish-purple Platycodon grandiflorus flowers for yet unidentified flavonoid-related compounds and their flower coloration mechanisms. identified a new polyacylated anthocyanin, delphinidin 3-O-[6-O-(α-rhamnopyranosyl)-β-glucopyranoside]-7-O-[6-O-(4-O-(6-O-(4-O-(6-O-(4-O-(β-glucopyranosyl)-trans-caffeoyl)-β-glucopyranosyl)-trans-caffeoyl)-β-glucopyranosyl)-trans-caffeoyl)-β-gluc...

Solanum melongena is a member of genus that widely cultivated as fruit vegetable in Vietnam. According to Vietnamese traditional medicine, the fruits and whole plants are used treat toothache, turgescence, pruritus, haemorrhoids. As part our project study chemical composition bioactivity Vietnam, five flavonoid glycosides including kaempferol-3-O-β-D-glucopyranoside (1), isovitexin (2), kaempfe...

A new flavonoid, acacetin-7-O-β-D-glucopyranosyl-(1 → 2)-β-D-glucuronopyranoside (1), together with four known flavonoids, apigenin-7-O-β-D-glucopyranosyl-(1 (2), acacetin (3), acacetin-7-O-β-D-glucuronide (4) and genkwanin-5-O-primveroside (5) were isolated from the leaves of Glyphaea brevis. Their structures elucidated by spectroscopic techniques. The compounds (1 - 5) tested for their antiox...

The synthesis of nanoscaled β-Bi(2)O(3) starting from the bismuth oxido clusters [Bi(6)O(4)(OH)(4)](NO(3))(6)·H(2)O, [Bi(22)O(26)(OSiMe(2)(t)Bu)(14)], [Bi(38)O(45)(NO(3))(20)(DMSO)(28)](NO(3))(4)·4DMSO and [Bi(38)O(45)(OMc)(24)(DMSO)(9)]·2DMSO·7H(2)O (OMc = O(2)CC(3)H(5)) under ambient conditions is reported. The metal oxido clusters are regarded as ideal precursors for β-Bi(2)O(3) due to their...