Eriosematin

Eriosematin
Product Name Eriosematin
CAS No.: 168010-17-1
Catalog No.: CFN93109
Molecular Formula: C19H20O4
Molecular Weight: 312.36 g/mol
Purity: >=98%
Type of Compound: Flavonoids
Physical Desc.: Powder
Source: The herbs of Flemingia philippinensis
Solvent: Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.
Price:
Reference standards.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months(2-8C).

Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.

Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com

The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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    Helvetica Chimica Acta, 2010,79(4):1147-1158.
    Electrochemical Behaviour and Antioxidant Activity of Some Natural Polyphenols[Reference: WebLink]

    METHODS AND RESULTS:
    A number of natural polyphenols (chlorogenic acid (9), cordigol (11), cordigone (12), danthrone (1), 1,5-dihydroxy-3-methoxyxanthone (2), Eriosematin (7), flemichin D (8), frutinone A (6), mangiferin (4), quercetin (5), 1,3,6,7-tetrahydroxyxanthone (3) and verbascoside (10)) were investigated for their redox properties using cyclic voltammetry. The antioxidant properties of these compounds were also examined in two models, namely lipid peroxidation in rat synaptosomes and AAPH-mediated oxidation of serum albumin. Compounds with a catechol group (9, 4, 5, 3 and 10) were oxidized below 0.4 V and inhibited lipid peroxidation with IC50 values between 2 and 8 μM. Compounds having one or more isolated phenolic groups and showing an oxidation potential between 0.45 and 0.8 V (11, 12 and 8) inhibited lipid peroxidation with IC50 between 7 and 9 μM, except 2 (0.45 V), danthrone (0.96 V) and Eriosematin which showed no or modest antioxidant activity.
    CONCLUSIONS:
    Some of the investigated compounds also protected albumin from oxidation, but no structure-activity relationship was apparent, suggesting that other factors beside redox potential influence this activity.
    Zhongguo Zhong Yao Za Zhi. 2009 Mar;34(6):724-6.
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    To investigate the chemical constituents of the roots of Flemingia philippinensis.
    METHODS AND RESULTS:
    Silica gel, ODS silica gel and Sephadex LH-20 column chromatography were employed for the isolation and purification. The structures were identified on the basis of spectral data (MS, 1H-NMR and 13C-NMR) and chemical evidence. Seven compounds were isolated from the 75% ethanolic extract of the roots of F. philippinensis and identified as follows: flemiphilippinin D (1), dorsmanins I (2), osajin (3), Eriosematin (4), lupinalbin A (5), genistein (6) and 3'-O-methylorobol (7).
    CONCLUSIONS:
    The compounds 2, 3 and 4 were isolated from the genus Flemingia for the first time. The compounds 2 and 4 were obtained from the Flemingia philippinensis for the first time.
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