Cephalocyclidin A
Reference standards.
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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.
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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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J Org Chem. 2002 Apr 5;67(7):2283-6.
Cephalocyclidin A, a novel pentacyclic alkaloid from Cephalotaxus harringtonia var. nana.[Pubmed:
11925242]
METHODS AND RESULTS:
A novel alkaloid with an unprecedented fused-pentacyclic skeleton and six-consecutive asymmetric centers, Cephalocyclidin A (1), has been isolated from the fruits of Cephalotaxus harringtonia var. nana, and the structure was elucidated on the basis of spectroscopic data.
CONCLUSIONS:
The relative and absolute stereochemistry of Cephalocyclidin A was determined by a combination of NOESY correlations, X-ray crystallographic data, and the exciton chirality method.
