Two flavonoid triglycosides from Buddleja madagascariensis

Emam, Ahmed M.; Élias, Riad; Moussa, Ayman S.; Faure, Robert; Debrauwer, Laurent; Balansard, G.

doi:10.1016/s0031-9422(97)01043-1

Cited by 23 publications

(16 citation statements)

References 5 publications

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“…The HSQC spectrum furnished all the direct correlations between protons and carbons (Table 1). Comparison with literature data also confirmed the 13 C values for a scutellarein-7-O-glycoside (Emam et al, 1998). Thus, the structure of 1 could be deduced as being the new flavone glycoside scutellarein-7-O-b-D-apiofuranoside ( Fig.…”

Section: Resultssupporting

confidence: 73%

“…1). The other major compounds from L. trifolia were identified as phenolic acids vanillic acid (6), protocatechuic acid (7), 4-hydroxybenzoic acid (8), caffeic acid (9), coumaric acid (10), phenylpropanoid glycosides betonyoside F (4), verbascoside (5) (Wu et al, 2004), martynoside (11) and samioside (14), and 6-hydroxy flavones scutellarein-7-O-b-D-glucopyranoside (12) (Emam et al, 1998) and sorbifolin (13) (Alam et al, 1986) by 1 H and 13 C NMR spectroscopic analyses and comparison of data with those in the literature. Betonyoside F (4) and samioside (14) were reported, respectively, from aerial parts of Stachys officinalis (Miyase et al, 1996) and Phlomis samia (Kyriakopoulou et al, 2001), two genus of the family Lamiaceae (Labiatae), which is very close to the Verbenaceae.…”

Section: Resultsmentioning

confidence: 99%

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Flavones and phenylpropanoids from a sedative extract of Lantana trifolia L.

et al. 2010

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Section: Resultssupporting

confidence: 73%

Section: Resultsmentioning

confidence: 99%

Flavones and phenylpropanoids from a sedative extract of Lantana trifolia L.

et al. 2010

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“…Figure 2. 1 H-and 13 C-NMR spectral data of each sugar unit and the deshielding effect of the connections were further confirmed by a comparison of its spectral data with literature values for flavonoid triglycosides [17][18][19]. From all these results, KSR1…”

Section: Introductionsupporting

confidence: 63%

Acylated Flavone Glycosides from the Roots of Saussurea lappa and Their Antifungal Activity

2007

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Abstract:The isolation of four novel acylated flavonoid glycosides from the roots of Saussurea lappa and their identification using a combination of 1D and 2D NMR and mass spectrometry is described. The in vitro antifungal and antibacterial activities of the isolated compounds and their mixture were tested on nine fungal and four bacterial strains, using the microdilution method. The compounds and mixture showed moderate to high antifungal activity against most of the fungi tested, compared to a miconazole standard, while only one compound and the mixture showed antibacterial activity against all strains tested.

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“…The 13 C NMR (150 MHz, pyridine‐d5) spectrum of the compound showed: δ 182.6 (C‐4), δ 165.7 (C‐2), δ 164.4 (C‐7), δ 63.0 (C‐5), δ 158.4 (C‐9), δ 152.25 (C‐4′), δ 148.81 (C‐3′), δ 122.43 (C‐1′), δ 121.18 (C‐6′), δ 116.8 (C‐5′), δ 110.2 (C‐2′), δ 104.9 (C‐10), δ 104.1 (C‐3), δ 99.8 (C‐6), δ 94.8 (C‐8), and δ 55.87 (). The compound is the same as that which was reported by Emam et al . (1998) and was identified as diosmetin.…”

Section: Resultsmentioning

confidence: 60%

Compounds from the subterranean part of Johnsongrass and their allelopathic potential

Liu

Zhang

Wei

et al. 2011

Weed Biology and Management

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The allelopathic effects of the exotic invasive weed, Johnsongrass, on Lactuca sativa, a native plant in China, were evaluated and the phytotoxins were investigated under laboratory conditions.The crude extracts (chloroform and ethyl acetate fractions) that were obtained from the ethanol extract of the subterranean parts of Johnsongrass inhibited the germination speed and growth of the roots and shoots of the test plant. The four compounds, ethyl p-hydroxybenzoate, diosmetin, apigenin, and luteolin, were isolated from the extract of the subterranean parts of Johnsongrass first, along with three other compounds (reported previously), p-hydroxybenzaldehyde, p-hydroxybenzoic acid, and dhurrin, and they all were evaluated on L. sativa. At the concentration of <0.5 mmol L -1 , ethyl p-hydroxybenzoate, dhurrin, and the mixture of the compounds delayed the germination speed of the seeds of L. sativa at 24 h of incubation, while apigenin delayed the germination speed of the seeds of L. sativa at 72 h of incubation. Ethyl p-hydroxybenzoate demonstrated the strongest delaying effect among the phenols and a similar effect was found with apigenin among the flavonoids, wheras ethyl p-hydroxybenzoate induced a drastic inhibition of the germination at 2 mmol L -1 . In contrast, p-hydroxybenzaldehyde and luteolin had no effect on the germination at any concentration at any stage. All the substances inhibited the shoot and root growth of L. sativa at 3 mmol L -1 . Increasing the concentration increased the inhibition of the growth of L. sativa.The inhibitory activity of ethyl p-hydroxybenzoate and p-hydroxybenzaldehyde was greater than that of the other compounds.This result suggested that the isolated phytotoxins might contribute to the successful invasion by Johnsongrass.

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Two flavonoid triglycosides from Buddleja madagascariensis

Cited by 23 publications

References 5 publications

Flavones and phenylpropanoids from a sedative extract of Lantana trifolia L.

Flavones and phenylpropanoids from a sedative extract of Lantana trifolia L.

Acylated Flavone Glycosides from the Roots of Saussurea lappa and Their Antifungal Activity

Compounds from the subterranean part of Johnsongrass and their allelopathic potential

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