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4,9-Dihydroxy-alpha-lapachone
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Product Name 4,9-Dihydroxy-alpha-lapachone
Price:
CAS No.: 56473-67-7
Catalog No.: CFN98947
Molecular Formula: C15H14O5
Molecular Weight: 274.3 g/mol
Purity: >=98%
Type of Compound: Quinones
Physical Desc.: Yellow powder
Source: The herbs of Catalpa ovata
Solvent: Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.
Download: COA    MSDS    SDF
Similar structural: Comparison (Web)  (SDF)
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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
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Biological Activity
Description: 4,9-Dihydroxy-alpha-lapachone has antitumor-promoting effects, it exhibits significant inhibitory activity against 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced Epstein-Barr virus early antigen (EBV-EA) activation in Raji cells. 4,9-Dihydroxy-alpha-lapachone exhibits potent inhibitory effects on lipopolysaccharide-induced NO synthesis in RAW 264.7 cells , with IC(50) value of 2.73 microM.
Targets: NO
In vitro:
Arch Pharm Res. 2010 Mar;33(3):381-5.
Naphthoquinones from Catalpa ovata and their inhibitory effects on the production of nitric oxide.[Pubmed: 20361302]

METHODS AND RESULTS:
Together with nine known compounds, catalponol (1), catalponone (2), catalpalactone (3), alpha-lapachone (4), 9-hydroxy-alpha-lapachone (5), 4,9-Dihydroxy-alpha-lapachone (6), 9-methoxy-alpha-lapachone (7), 4-oxo-alpha-lapachone (8), and 9-methoxy-4-oxo-alpha-lapachone (9). The structures were elucidated on the basis of spectroscopic analyses. The inhibitory effects of these isolates on lipopolysaccharide-induced NO synthesis in RAW 264.7 cells were evaluated.
CONCLUSIONS:
Among them, catapalactone (3), 9-hydroxy-alpha-lapachone (5) and 4,9-Dihydroxy-alpha-lapachone (6) exhibited potent inhibitory effects, with IC(50) values of 9.80, 4.64 and 2.73 microM, respectively.
4,9-Dihydroxy-alpha-lapachone Description
Source: The herbs of Catalpa ovata
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)

PMID: 29328914

Cell Metab. 2020 Mar 3;31(3):534-548.e5.
doi: 10.1016/j.cmet.2020.01.002.
IF=22.415(2019)

PMID: 32004475

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doi: 10.1016/j.molcel.2017.10.022.
IF=14.548(2019)

PMID: 29149595

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doi: 10.1021/acsnano.7b08969.
IF=13.903(2019)

PMID: 29553709

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Calculate Dilution Ratios(Only for Reference)
1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 3.6456 mL 18.2282 mL 36.4564 mL 72.9129 mL 91.1411 mL
5 mM 0.7291 mL 3.6456 mL 7.2913 mL 14.5826 mL 18.2282 mL
10 mM 0.3646 mL 1.8228 mL 3.6456 mL 7.2913 mL 9.1141 mL
50 mM 0.0729 mL 0.3646 mL 0.7291 mL 1.4583 mL 1.8228 mL
100 mM 0.0365 mL 0.1823 mL 0.3646 mL 0.7291 mL 0.9114 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
Cell Research:
J Nat Prod. 1998 May;61(5):629-32.
Antitumor-promoting naphthoquinones from Catalpa ovata.[Pubmed: 9599262]

METHODS AND RESULTS:
Bioassay-directed fractionation of an extract of the stem-bark of Catalpa ovata led to the isolation of three new naphthoquinones: 8-methoxydehydroiso-alpha-lapachone (1), 9-methoxy-4-oxo-alpha-lapachone (2), and (4S,4aR,10R,10aR)-4, 10-dihydroxy-2,2-dimethyl-2,3,4,4alpha,10, 10alpha-hexahydrobenzo[g]chromen-5-one (3), which is a 1,4-reductive form of 6. The known compounds 3-hydroxydehydroiso-alpha-lapachone (4), 4,9-Dihydroxy-alpha-lapachone (5), 4-hydroxy-alpha-lapachone (6), and 9-methoxy-alpha-lapachone (7), and catalpalactone (8) were also isolated. Their structures were elucidated by spectral methods.
CONCLUSIONS:
These compounds all exhibited significant inhibitory activity against 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced Epstein-Barr virus early antigen (EBV-EA) activation in Raji cells.
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