Stevia impurity (13-[(2-O-6-deoxy--D-glucopyranosyl-3-O--D-glucopyranosyl--D-glucopyranosyl)oxy]ent-kaur-16-en-19-oic acid -D-glucopyranosyl ester)

Stevia impurity (13-[(2-O-6-deoxy--D-glucopyranosyl-3-O--D-glucopyranosyl--D-glucopyranosyl)oxy]ent-kaur-16-en-19-oic acid -D-glucopyranosyl ester)
Product Name Stevia impurity (13-[(2-O-6-deoxy--D-glucopyranosyl-3-O--D-glucopyranosyl--D-glucopyranosyl)oxy]ent-kaur-16-en-19-oic acid -D-glucopyranosyl ester)
CAS No.: 1309929-72-3
Catalog No.: CFN95229
Molecular Formula: C44H70O22
Molecular Weight: 951.0 g/mol
Purity: >=98%
Type of Compound: Diterpenoids
Physical Desc.: Powder
Source: The leaves of Stevia rebaudiana Bertoni.
Solvent: DMSO, Pyridine, Methanol, Ethanol, etc.
Price: $463/5mg
Reference standards.
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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.

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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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    Carbohydrate Research, 2011, 346(8):1057-1060.
    Structures of the novel diterpene glycosides from Stevia rebaudiana.[Reference: WebLink]

    METHODS AND RESULTS:
    From the commercial extract of the leaves of Stevia rebaudiana, two new diterpenoid glycosides were isolated besides the known steviol glycosides including stevioside, rebaudiosides A-F, rubusoside, and dulcoside A.
    CONCLUSIONS:
    The structures of the two new compounds were identified as 13-[(2-O-6-deoxy-β-d-glucopyranosyl-β-d-glucopyranosyl)oxy] ent-kaur-16-en-19-oic acid β-d-glucopyranosyl ester (1), and Stevia impurity (13-[(2-O-6-deoxy-β-D-glucopyranosyl-3-O-β-D-glucopyranosyl-β-D-glucopyranosyl)oxy]ent-kaur-16-en-19-oic acid β-D-glucopyranosyl ester) (2), on the basis of extensive NMR and MS spectral data as well as chemical studies.
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