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Erythrabyssin II
Erythrabyssin II
ChemFaces products have been cited in many studies from excellent and top scientific journals
Product Name Erythrabyssin II
Price:
CAS No.: 77263-06-0
Catalog No.: CFN97959
Molecular Formula: C25H28O4
Molecular Weight: 392.5 g/mol
Purity: >=98%
Type of Compound: Flavonoids
Physical Desc.: Powder
Source: The herbs of Erythrina arborescens
Solvent: Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.
Download: COA    MSDS    SDF
Similar structural: Comparison (Web)  (SDF)
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According to end customer requirements, ChemFaces provide solvent format. This solvent format of product intended use: Signaling Inhibitors, Biological activities or Pharmacological activities.
Size /Price /Stock 10 mM * 1 mL in DMSO / Inquiry
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Related Screening Libraries
Size /Price /Stock 10 mM * 100 uL in DMSO / Inquiry / In-stock
10 mM * 1 mL in DMSO / Inquiry / In-stock
Related Libraries
Biological Activity
Description: Erythrabyssin II actives against several strains of Staphylococcus and Streptococcus with an MIC range of 0.78-1.56 microg/ml. It inhibits bacterial neuraminidase in a dose-dependent manner with significant inhibition (IC(50)=0.09-3.25 μM).
Targets: Antifection
In vitro:
J Ethnopharmacol. 2007 Mar 1;110(1):171-5.
Antibacterial pterocarpans from Erythrina subumbrans.[Pubmed: 17055201]

METHODS AND RESULTS:
Seven pterocarpans, erybraedin B (1), erybraedin A (2), phaseollin (3), Erythrabyssin II (4), erystagallin A (5), erythrabissin-1 (6) and erycristagallin (7), two flavanones, 5-hydroxysophoranone (8) and glabrol (9), and one isoflavone, erysubin F (10), were isolated from the stems of Erythrina subumbrans (Leguminosae). Compounds 2 and 4 exhibited the highest degree of activity against Streptococcus strains with an MIC range of 0.78-1.56 microg/ml, whereas compound 7 exhibited the highest degree of activity against Staphylococcus strains, including drug-resistant strains (MRSA and VRSA), with an MIC range of 0.39-1.56 microg/ml. Interestingly, compounds 2, 4, 5 and 7 were more active against several strains of Streptococcus and Staphylococcus than the standard antibiotics vancomycin and oxacillin.
CONCLUSIONS:
These compounds may prove to be potent phytochemical agents for antibacterial activity, especially against the MRSA and VRSA strains.
Erythrabyssin II Description
Source: The herbs of Erythrina arborescens
Solvent: Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.
Storage: 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

After receiving: 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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Recently, ChemFaces products have been cited in many studies from excellent and top scientific journals

Cell. 2018 Jan 11;172(1-2):249-261.e12.
doi: 10.1016/j.cell.2017.12.019.
IF=36.216(2019)

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Cell Metab. 2020 Mar 3;31(3):534-548.e5.
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Calculate Dilution Ratios(Only for Reference)
1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 2.5478 mL 12.7389 mL 25.4777 mL 50.9554 mL 63.6943 mL
5 mM 0.5096 mL 2.5478 mL 5.0955 mL 10.1911 mL 12.7389 mL
10 mM 0.2548 mL 1.2739 mL 2.5478 mL 5.0955 mL 6.3694 mL
50 mM 0.051 mL 0.2548 mL 0.5096 mL 1.0191 mL 1.2739 mL
100 mM 0.0255 mL 0.1274 mL 0.2548 mL 0.5096 mL 0.6369 mL
* Note: If you are in the process of experiment, it's need to make the dilution ratios of the samples. The dilution data of the sheet for your reference. Normally, it's can get a better solubility within lower of Concentrations.
Protocol
Kinase Assay:
Bioorg Med Chem Lett. 2011 Oct 15;21(20):6100-3.
Potent inhibition of bacterial neuraminidase activity by pterocarpans isolated from the roots of Lespedeza bicolor.[Pubmed: 21911291]
Bacterial neuraminidase has been highlighted as a key enzyme for pathogenic infection and sepsis.
METHODS AND RESULTS:
Six pterocarpans displaying significant levels of neuraminidase inhibitory activity were isolated from the root bark of Lespedeza bicolor. The isolated compounds were identified as three new pterocarpans (1-3) together with known compounds Erythrabyssin II (4), lespebuergine G4 (5), and 1-methoxyErythrabyssin II (6). The new compounds were characterized as bicolosin A (1), bicolosin B (2), and bicolosin C (3). All compounds inhibited bacterial neuraminidase in a dose-dependent manner with significant inhibition (IC(50)=0.09-3.25 μM).
CONCLUSIONS:
All neuraminidase inhibitors screened were found to exhibit noncompetitive kinetics. The three most potent neuraminidase inhibitors (1, 3 and 6) feature a methoxy substitution on C-1.
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