6-O-Syringoylajugol
6-O-Syringoylajugol posseses antioxidant activity.
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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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Australian Journal of Basic & Applied Sciences, 2010, 4(10):5038-50.
Glycosides of Verbascum letourneuxii, Asch. and its Antioxidant Activity[Reference:
WebLink]
METHODS AND RESULTS:
Five iridoid glycosides, 6-O-(α-L-rhamnopyranopranosyl)-catalpol, 6-O-(3″-O-acetyl-2″-O-p- methoxy cinnamoyl-α-L-rhamnopyranosyl) catalpol, 6-O-(3″-O-p-methoxycinnamoyl-α-Lrhamnopyranopyranosyl) aucubin, 6-O-Syringoylajugol and harpagoside have been isolated from the methanolic extract of Verbascum letourneuxii, beside isolation of two phenylethanoide glucoside, eukovoside, martynoside, two phenylpropanoid glucoside, syringin and coniferin, from the ethyl acetate extract. Meanwhile two neolignan glucosides, dehydrodiconferyl alcohol-9-O-β-D-glucopyranoside and 4-O-methyl-dehydrodiconiferylalcohol-9′-O-β-D-glucopyranoside have been isolated from the butanol extract. These compounds were isolated, purified by column chromatography and PTLC then identified through UV, I.R., Mass, 13C and 1H-NMR spectral data.
CONCLUSIONS:
The antioxidant activity of the plant extract using diphenylpicryl hydrazyl (DPPH) radical scavenging method showed that the butanol, ethyl acetate and methanol (80%) extracts posses antioxidant activity.
