epsilon-Viniferin
Epsilon-Viniferin is a bacteriostatic stilbenoid as it antagonized the bactericidal activity of vancomycin. Epsilon-viniferin shows a human cytochrome P450 enzymes inhition activity, it exhibits good antioxidant capacity in the DMSO/O(-)(2) polar system (IC50= 0.14 mM). Epsilon-viniferin and epsilon-viniferin pentaacetate slightly reduce cell proliferation but might protect from cell degenerescence.(-)-Trans-epsilon-viniferin is an inhibitor of noradrenaline and 5-hydroxytryptamine uptake and of monoamine oxidase activity, it may be of value as a structural template for the design and development of new antidepressant drugs.
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Recommended storage conditions and precautions regarding proper product handling are contained in the product Certificate of Analysis (COA). Here are general storage guidelines for compounds:
Powder: -20°C 3 years and 4°C 2 years
In solvent: -80°C 6 months and -20°C 1 month
If the solution is stored at -20°C for more than one month, it should be re-examined to ensure its efficacy. Avoid repeated freeze and thaw cycles.
Storage conditions for some special products should refer to their COAs.
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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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