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    CAS No. 119400-87-2 Price $398 / 5mg
    Catalog No.CFN99306Purity>=98%
    Molecular Weight272.4 Type of CompoundDiterpenoids
    FormulaC18H24O2Physical DescriptionPowder
    Download Manual    COA    MSDS    SDFSimilar structuralComparison (Web)
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    Przewalskin Description
    Source: The roots of Salvia miltiorrhiza
    Biological Activity or Inhibitors: 1. Przewalskin A shows modest anti-HIV-1 activity with EC50 = 41 microg/mL.
    2. Przewalskin B exhibits modest anti-HIV-1 activity with EC50 = 30 microg/mL.
    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.
    Calculate Dilution Ratios(Only for Reference)
    1 mg 5 mg 10 mg 20 mg 25 mg
    1 mM 3.6711 mL 18.3554 mL 36.7107 mL 73.4214 mL 91.7768 mL
    5 mM 0.7342 mL 3.6711 mL 7.3421 mL 14.6843 mL 18.3554 mL
    10 mM 0.3671 mL 1.8355 mL 3.6711 mL 7.3421 mL 9.1777 mL
    50 mM 0.0734 mL 0.3671 mL 0.7342 mL 1.4684 mL 1.8355 mL
    100 mM 0.0367 mL 0.1836 mL 0.3671 mL 0.7342 mL 0.9178 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.
    Przewalskin References Information
    Citation [1]

    J Agric Food Chem. 2009 Aug 12;57(15):6879-87.

    Chemical characteristics of Salvia miltiorrhiza (Danshen) collected from different locations in China.[Pubmed: 19601629]
    The chemical characteristics of Salvia miltiorrhiza , also called "danshen" in China, were investigated on the basis of the simultaneous quantitative determination of 13 hydrophilic and lipophilic compounds, namely, protocatechuic acid, protocatechuic aldehyde, caffeic acid, ferulic acid, isoferulic acid, rosmarinic acid, salvianolic acid B, salvianolic acid A, dihydrotanshinone I, Przewalskin, cryptotanshinone, tanshinone I, and tanshinone IIA, in 74 samples collected from different locations using ultraperformance liquid chromatography (UPLC). Hierarchical clustering analysis based on 13 investigated compounds and the similarity of the entire chromatographic pattern showed that S. miltiorrhiza was significantly different from Salvia przewalskii , an adulterant of danshen. The chemical characteristics of S. miltiorrhiza collected from different locations in China were revealed, and salvianolic acid B, rosmarinic acid, cryptotanshinone, and tanshinones I and IIA were optimized as markers for the evaluation, which is helpful in the quality control of S. miltiorrhiza.
    Citation [2]

    Planta Med. 2006 Jan;72(1):84-6.

    Two new abietane diterpenoids from Salvia yunnanensis.[Pubmed: 16450305]
    Two new abietane diterpenoids, yunnannin A and danshenol C, were isolated from Salvia yunnanensis together with ten known diterpenoids, danshenol A, Przewalskin, tanshinone IIA, tanshinone I, crypotanshinone, 1,2-dihydrotanshinone, tanshinlactone, 5,6-dehydrosugiol, 12-hydroxy-6,7-seco-8,11,3-abietatriene-6,7-dial and phytol. Their structures were established based on spectroscopic data, chemical reactions and comparison with literature data. Compounds were tested for their antitumor activity in T-24, QGY, K562, Me180 and BIU87 cell lines. Compound showed inhibited growth of K562 (IC50=0.53 microg/mL), T-24 (IC50=7.94 microg/mL), QGY (IC50=4.65 microg/mL) and Me180 (IC50=6.89 microg/mL) cell lines while compound was inactive. Compound showed moderate inhibitory activity on QGY (IC50=16.75 microg/mL) and Me180 (IC50=5.84 microg/mL) cells.
    Citation [3]

    Org.Lett.,2006 Sep 28;8(20):4453-6.

    Przewalskin A: A new C23 terpenoid with a 6/6/7 carbon ring skeleton from Salvia przewalskii maxim.[Pubmed: 16986923]
    Przewalskin A (1), a novel C23 terpenoid with a 6/6/7 carbon ring skeleton, was isolated from Salvia przewalskii. Its structure was determined by comprehensive 1D NMR, 2D NMR, and MS spectroscopic analysis and subsequently confirmed by a single-crystal X-ray diffraction study of its PDC oxidation derivative (2). Compounds 1 and 2 showed modest anti-HIV-1 activity with EC50 = 41 and 89 microg/mL, respectively.
    Citation [4]

    Org Lett. 2007 Jan 18;9(2):291-3.

    Przewalskin B, a novel diterpenoid with an unprecedented skeleton from Salvia przewalskii maxim.[Pubmed: 17217287 ]
    Przewalskin B (1), a novel diterpenoid possessing a unique skeleton, was isolated from a Chinese medicinal plant Salvia przewalskii. Its structure and relative stereochemistry were elucidated by extensive NMR analysis and a single-crystal X-ray study. A possible biosynthetic pathway for 1 was proposed. Compound 1 exhibited modest anti-HIV-1 activity with EC50 = 30 microg/mL.