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Viscosalactone B
Viscosalactone B
ChemFaces products have been cited in many studies from excellent and top scientific journals
Product Name Viscosalactone B
Price:
CAS No.: 76938-46-0
Catalog No.: CFN92968
Molecular Formula: C28H40O7
Molecular Weight: 488.61 g/mol
Purity: >=98%
Type of Compound: Steroids
Physical Desc.: Powder
Source: The roots of Physalis viscosa.
Solvent: Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.
Download: COA    MSDS
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: Viscosalactone B shows antiproliferative activity on NCI-H460 (Lung), HCT-116 (Colon), SF-268 (Central Nervous System; CNS and MCF-7 (Breast) human tumor cell lines. It also shows selective COX-2 enzyme inhibition.
Targets: COX
In vitro:
Tetrahedron, 2003, 59(6):841-849.
Cyclooxygenase-2 inhibitory withanolides from Withania somnifera leaves.[Reference: WebLink]
Four novel withanolide glycosides and a withanolide have been isolated from the leaves of Withania somnifera.
METHODS AND RESULTS:
The structures of the novel compounds were elucidated as physagulin D (1→6)-β-d-glucopyranosyl-(1→4)-β-d-glucopyranoside (1), 27-O-β-d-glucopyranosyl physagulin D (2), 27-O-β-d-glucopyranosyl Viscosalactone B (3), 4,16-dihydroxy-5β, 6β-epoxyphysagulin D (4), and 4-(1-hydroxy-2,2-dimethylcyclo-propanone)-2,3-dihydrowithaferin A (5) on the basis of 1D-, 2D NMR and MS spectral data. In addition, seven known withanolides withaferin A (6), 2,3-dihydrowithaferin A (7), Viscosalactone B (8), 27-desoxy-24,25-dihydrowithaferin A (9), sitoindoside IX (10), physagulin D (11), and withanoside IV (12) were isolated. These withanolides were assayed to determine their ability to inhibit cycloxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2) enzymes and lipid peroxidation.
CONCLUSIONS:
The withanolides tested, except compound 9, showed selective COX-2 enzyme inhibition ranging from 9 to 40% at 100μg/ml. Compounds 4, 10 and 11 also inhibited lipid peroxidation by 40, 44 and 55%, respectively. The inhibition of COX-2 enzyme by withanolides is reported here for the first time.
Life Sci. 2003 Nov 21;74(1):125-32.
Growth inhibition of human tumor cell lines by withanolides from Withania somnifera leaves.[Pubmed: 14575818]
Ayurvedic medicines prepared in India consist of Withania somnifera roots as one of the main ingredients. It is consumed as a dietary supplement around the world. The leaves of W. somnifera were used in the treatment of tumors and inflammation in several Asian countries.
METHODS AND RESULTS:
We have isolated twelve withanolides such as withaferin A (1), sitoindoside IX (2), 4-(1-hydroxy-2, 2-dimethylcyclpropanone)-2, 3-dihydrowithaferin A (3), 2, 3-dihydrowithaferin A (4), 24, 25-dihydro-27-desoxywithaferin A (5), physagulin D (1-->6)-beta-D-glucopyranosyl- (1-->4)-beta-D-glucopyranoside (6), 27-O-beta-D-glucopyranosylphysagulin D (7), physagulin D (8), withanoside IV (9), and 27-O-beta-D-glucopyranosylViscosalactone B (10), 4, 16-dihydroxy-5beta, 6beta-epoxyphysagulin D (11), Viscosalactone B (12) from the leaves of this species. Compounds 1-12 and diacetylwithaferin A (13) were tested for their antiproliferative activity on NCI-H460 (Lung), HCT-116 (Colon), SF-268 (Central Nervous System; CNS and MCF-7 (Breast) human tumor cell lines. The inhibitory concentration to afford 50% cell viability (IC50) for these compounds was determined by MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide) assay.
CONCLUSIONS:
Withaferin A and its derivatives exhibited inhibitory concentrations (50%) ranging from 0.24 +/- 0.01 to 11.6 +/- 1.9 microg/mL. Viscosalactone B (12) showed the 50% inhibition at concentrations ranging from 0.32 +/- 0.05 to 0.47 +/- 0.15 microg/mL whereas its 27-O-glucoside derivative (10) exhibited IC50 between 7.9 +/- 2.9 and 17.3 +/- 3.9 microg/ml. However, Physagulin D type withanolides showed either weak or no activity at 30 microg/mL. Therefore, incorporation of withanolides in the diet may prevent or decrease the growth of tumors in human.
Viscosalactone B Description
Source: The roots of Physalis viscosa.
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.

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Calculate Dilution Ratios(Only for Reference)
1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 2.0466 mL 10.2331 mL 20.4662 mL 40.9324 mL 51.1656 mL
5 mM 0.4093 mL 2.0466 mL 4.0932 mL 8.1865 mL 10.2331 mL
10 mM 0.2047 mL 1.0233 mL 2.0466 mL 4.0932 mL 5.1166 mL
50 mM 0.0409 mL 0.2047 mL 0.4093 mL 0.8186 mL 1.0233 mL
100 mM 0.0205 mL 0.1023 mL 0.2047 mL 0.4093 mL 0.5117 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.
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