Pregomisin
Pregomisin shows platelet-activating factor (PAF) antagonistic activity and the IC 50 value is 4.8x10(-5) M.
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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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Arch Pharm Res. 1997 Dec;20(6):633-6.
Platelet-activating factor antagonistic activity and(13)C NMR assignment of pregomisin and chamigrenal fromSchisandra chinensis.[Pubmed:
18982271]
METHODS AND RESULTS:
In the course of searching for PAF receptor antagonists, Pregomisin (1) and chamigrenal (2) were isolated from the fruits ofSchizandra chinensis Baill by the bioactivity-guided isolation.
CONCLUSIONS:
Both compounds showed PAF antagonistic activity and the IC(50) values were 4.8x10(-5) M and 1.2x10(-4) M, respectively. In addition, the(13)C NMR assignments of1 and2 using DEPT, HMQC, COLOC and HMBC were reported for the first time.
Chem Pharm Bull (Tokyo). 2007 Aug;55(8):1281-3.
Lignans from Schisandra propinqua var. propinqua.[Pubmed:
17666862]
METHODS AND RESULTS:
Two new dibenzocyclooctadiene lignans angeloyl-(+)-gomisin K(3) (1) and methylisogomisin O (2), together with six known ones, isogomisin O, angeloylisogomisin O, gomisin O, angeloygomisin O, benzoylgomisin O, epigomisin O, and four 1,4-bis(phenyl)-2,3-dimethylbutane type lignans, Pregomisin, meso-dihydroguaiaretic acid, isoanwulignan, and sphenanlignan were isolated from the aerial parts of Schisandra propinqua var. propinqua.
CONCLUSIONS:
The structures of 1 and 2 were elucidated by spectroscopic methods including extensive 1D- and 2D-NMR techniques.
