Calystegine N1
Calystegin N~ is a weaker inhibitor of glycosidases.
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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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ChemInform, 1996, 27(33).
Calystegin N1, a Novel Nortropane Alkaloid with a Bridgehead Amino Group from Hyoscyamus niger: Structure Determination and Glycosidase Inhibitory Activities.[Reference:
WebLink]
METHODS AND RESULTS:
Seven calystegins were isolated from the whole plant of Hyoscyamus niger. They are calystegins A 3, A 5, A 6, B t , B 2, B 3, and N 1. The structure of new calystegin A 6 was determined as la,2~,7a-trihydroxy-nor-tropane, and another new Calystegine N1 was elucidated to be a trihydroxy-nor-tropane alkaloid with a bridgehead NH 2 group in the place of a bridgehead OH group in calystegin B 2. Very interestingly, on storage for a half year in a refrigerator, approximately 40% of calystegin N I was nonenzymically converted into calystegin B 2.
CONCLUSIONS:
Calystegin N~ was a weaker inhibitor of glycosidases compared to calystegin B 2 but with the same inhibitory spectrum. However, calystegin N~ inhibited porcine kidney trehalase in a noncompetitive manner, whereas calystegin B 2 inhibited this enzyme in a competitive manner.
