Deacetyleupaserrin

Deacetyleupaserrin
Product Name Deacetyleupaserrin
CAS No.: 38456-39-2
Catalog No.: CFN96924
Molecular Formula: C20H26O6
Molecular Weight: 362.42 g/mol
Purity: >=98%
Type of Compound: Sesquiterpenoids
Physical Desc.: Powder
Source: The herbs of Eupatorium semiserratum DC.
Solvent: Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.
Price:
Deacetyleupaserrin is an antileukemic sesquiterpene lactone.
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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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    J Org Chem. 1973 Apr 6;38(7):1260-4.
    The isolation and structural elucidation of eupaserrin and deacetyleupaserrin, new antileukemic sesquiterpene lactones from Eupatorium semiserratum[Reference: WebLink]
    Evidence is presented for the assignment of structures for eupaserrin (1) and Deacetyleupaserrin (5), two antileukemic sesquiterpene lactones from Eupatorium semiserratum DC.
    METHODS AND RESULTS:
    Elemental analysis and high resolution mass spectrometry supported a C22H28O7 molecular formula for eupaserrin (1) and a C20H26O6 molecular formula for Deacetyleupaserrin (5). Acetylation of 5 gave 1 and acetyleupaserrin (2), whereas alkaline hydrolysis of 5 gave sarracinic acid. Chemical and spectral evidence indicated the presence of α-methylene-γ-lactone, α,β-unsaturated ester, secondary hydroxyl, and two vinyl methyl groupings in 1 and 5 and suggested that both 1 and 5 were germacranolide dienes. Pyrolysis of 5 gave an oily aldehyde lactone (6), and pyrolysis of 2 gave an enol acetate (3).
    CONCLUSIONS:
    Chemical and spectral arguments are advanced for assignment of structure and stereochemistry for 2 and 3 and therefore 1 and 5.
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