10-O-trans-p-methoxycinnamoyl-catalpol
10-O-Trans-p-methoxycinnamoylcatalpol has antioxidant activity with the IC50 value of 0.37 μM/mL in DPPH free radical scavenging assay.
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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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Natural Product Communications. September 1, 2008.
Study on the Chemical Constituents of Premna Integrifolia L[Reference:
WebLink]
Phytochemical study on the plant Premna integrifolia L. led to the isolation of twelve compounds. In which, a new acylated iridoid glycoside, 6-O-(3″-O-acetyl-2″-O-trans-p-coumaroyl)-α-L-rhamnopyranosylcatalpol (premnacorymboside A) (1), was isolated from the flowers along with 10-O-trans-p-methoxycinnamoylcatalpol (3) and verbascoside. From the leaves, a new iridoid glycoside, 6-O-(3″-O-trans-p-coumaroyl)-α-L-rhamnopyranosylcatalpol (premnacorymboside B) (2), together with 10-O-trans-p-methoxycinnamoylcatalpol (3), scutellarioside II (4), premnaodoroside A (5), 1-O-trans-p-coumaroyl-α-L-rhamnopyranoside, hexyl glucoside, 4-hydroxy-2-methoxybenzaldehyde, and 4-hydroxybenzaldehyde were obtained. The new compound premnacorymboside A (1) and scutellarioside II (4), were also isolated from the stem bark along with quercetin 3-rutinoside and leonuriside A. The structure determinations were based on physical and spectroscopic evidence.
