Sinapaldehyde glucoside
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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J Liq Chromatogr Relat Technol. 2014 Feb 1;37(4):572-587.
Enrichment and purification of pedunculoside and syringin from the barks of Ilex rotunda with macroporous resins.[Pubmed:
25104900]
Jiubiying, the dried barks of Ilex rotunda Thunb. (Aquifoliaceae), has been used as herbal tea and traditional Chinese medicine for heat-clearing, detoxifying, dehumidification, and odynolysis.
METHODS AND RESULTS:
Pedunculoside and syringin are two main bioactive components. For the new drug development, we tried to isolate and purify several chemical constituents from Jiubiying by high-speed counter-current chromatography (HSCCC). The two-phase solvent system used was composed of ethyl acetate-n-butanol-water (1:6:7, v/v/v). From 1.0 g of Jiubiying extracts syringaresinol 4',4″-bis-O-β-D- glucopyranoside (I, 20.2 mg), syringin (II, 56.8 mg), Sinapaldehyde glucoside (III, 26.2 mg), syringaresinol 4'-O-β-D-glucopyranoside (IV, 20.4 mg), and pedunculoside (V, 45.1 mg) were obtained by one run of TBE-1000A HSCCC machine with 1000 mL of column volume. Their structures were identified by IR, MS, and extensive NMR studies.
CONCLUSIONS:
Syringaresinol 4',4″-bis-O-β-D-glucopyranoside (I) was isolated from this plant for the first time.
