4,5-Di-O-caffeoylquinic acid methyl ester
4,5-Di-O-caffeoylquinic acid methyl ester shows high efficiency and low toxicity with antivirus activity against RSV.
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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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Chinese Traditional & Herbal Drugs, 2015 , 46 (11) :1597-602.
Study on chemical constituents from Re-Du-Ning Injection (II).[Reference:
WebLink]
To investigate the chemical constituents from Re-Du-Ning Injection (RDN).
METHODS AND RESULTS:
The chemical constituents were isolated by chromatography on silica gel, ODS, Sephadex LH-20, and Toyopearl HW-40 columns and reverse phase MPLC and HPLC repeatedly. Their structures were identified by spectral data and physicochemical property. Sixteen compounds were isolated and identified as 5-O-caffeoylquinic acid (1), 5-O-caffeoylquinic acid methyl ester (2), 4-O-caffeoylquinic acid (3), 5-O-caffeoylquinic acid methyl ester (4), 4,5-di-O-caffeoylquinic acid (5), 4,5-Di-O-caffeoylquinic acid methyl ester (6), 3,5- di-O-caffeoylquinic acid (7), 3,5-di-O-caffeoylquinic acid methyl ester (8), 3,4-di-O-caffeoylquinic acid (9), 3,4-di-O-caffeoylquinic acid methyl ester (10), secologanic acid (11), vogeloside (12), 7-epi-vogeloside (13), E-aldosecologanin (14), Z-aldosecologanin (15), and 5H,8H-pyrano[4,3-d] thiazolo[3,2-a] pyridine-3-carboxylic acid (16). Compounds 1-10 showed high efficiency and low toxicity with antivirus activity against RSV.
CONCLUSIONS:
All the isolated compounds are reported from RDN Injection for the first time, and caffeoylquinic acids may be one of antivirus pharmacodynamic material bases of RDN.
