Flavonoids and a New Polyacetylene from Bidens parviflora Willd

Abstract

Fifteen flavonoids, 1-7 and9-16, and a polyacetylene, 8, were isolated from the ethanol extract of the dried whole plant of Bidens parviflora Willd. by various chromatographic techniques. Their structures have been elucidated on the basis of spectroscopic analyses and chemical studies. Compound 8 is new and was identified as 3-(R),8(E)-decene-4,6-diyne-1,3,10-triol. All the flavonoid compounds were isolated for the first time from this plant species.

Antifungal Activity of a Polyacetylene against the Fungal Pathogen of Japanese Oak from the Liquid Culture of the Edible Mushroom, Hypsizygus marmoreus

“…Thus, on the basis of these results, the structure of 3 was determined to be 8(E)-decene-4,6-diyn-1,2,10-triol. Compound 3 was closely related to 8(E)-decene-4,6-diyn-1,3,10-triol, which was isolated previously from the dried whole plant of Bidens parviflora Willd [6]. The biological activity of 8(E)-decene-4,6-diyn-1,3,10-triol has not been reported.…”

“…The IR spectrum of 1 showed the presence of hydroxyl (3367 cm −1 ) and acetylene (2237 cm −1 ) groups. The 13 C NMR and DEPT spectra showed 10 carbon signals including characteristic signals due to three sp 3 methylenes [δ C = 25.1 (C-3), 62.7 (C-10), 65.9 (C-1)], two of which were linked to an oxygen atom, one oxymethine group [δ C = 71.6 (C-2)], two olefinic carbons [δ C = 109.0 (C-8), 147.2 (C-9)], and four quaternary 6.43 (dt, J= 15.9, 4.6 Hz, 1H, 9-H)]. In addition, the olefinic proton doublets with a coupling constant of 15.9 Hz could be attributed to the double bond in the trans configuration.…”

HIGH SPEED CENTRIFUGAL COUNTERCURRENT CHROMATOGRAPHY (HSCCC) ISOLATION AND IDENTIFICATION BY LC-MSn ANALYSIS OF THE POLAR PHENOLICS FROM VASCONCELLEA QUERCIFOLIA

“…Excluding rutin, all other flavonoids are reported for the first time for this species. Triglycosides related to those found in this species were reported from Bidens parviflora 17 and Bidens andicola. 18 …”

Flavonoids and Essential Oil of Bidens cernua of Polish Origin and in Vitro Antimicrobial Activity of the Oil

“…As a result of series isolation procedures and purification on Sephadex LH-20, compounds 1-6 were obtained. The known isolates were confirmed as luteolin (1) [6], flavanomarein (isookanin 7-O-β-D-glucopyranoside) (2) [7], maritimetin (4) [8], cynaroside (luteolin 7-O-β-D-glucopyranoside) (5) [6] and cosmosiin (apigenin 7-O-β-D-glucopyranoside) (6) [8] by the comparison of reported spectral and physical data. To the best of authors knowledge, this is the first report on the isolation of tilianin (acacetin 7-O-β-D-glucopyranoside) (3) from B. cernua.…”

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Abstract: Phytochemical studies of the aerial parts of Bidens cernua L. led to the isolation of six flavonoids: luteolin (1), flavanomarein (2), tilianin (3), maritimetin (4), cynaroside (5) and cosmosiin (6). The quantitative analysis of flavonoids exhibited 0.81% contents of flavonoids in flowers and 1.62% in the herb counted as a hyperoside equivalent.

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