The structure of silydianin, an isomer of silymarin (silybin), by x-ray analysis

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  • Oxidation of flavonolignan silydianin to unexpected lactone-acid derivative

    2019, Phytochemistry Letters
    Citation Excerpt :

    Silydianin (1) was crystallized from MeOH and the crystal was used for X-ray crystallography. The crystallographic data presented here are in agreement with the previously published structure (Abraham et al., 1970), but in a significantly higher resolution (original data d = 1.64 Å, this paper’s data d = 0.82 Å, Fig. 2), and were submitted to CCDC (ID 1553604). Flavonolignans can be oxidized to their dehydro-analogs (Di Fabio et al., 2013; Gažák et al., 2013).

  • Silymarin content in Silybum marianum populations growing in Egypt

    2016, Industrial Crops and Products
    Citation Excerpt :

    Silymarin (S0292-10G, Sigma, China), silybin primary reference standard 92.53% (HWI ANALYTIK GMBH pharma solutions, Rülzheim, Germany), and taxifolin analytical standard 85% (Sigma–Aldrich, St. Louis, MO, USA) were used as reference compounds. Isosilychristin, silychristin, and silydianin were prepared by preparative column chromatography and identified by 1H NMR (Abraham et al., 1970; Diep et al., 2007; Napolitano et al., 2013). The solvents used in this study, n-hexane and acetone (Pharmaco-AAper, Brookfield, CT, USA) were of reagent grade and re-distilled.

  • A new flavonolignan from milk thistle (Silybum marianum)

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