Rubroside H
Rubroside H may show antifungal activity against Aspergillus fumigatus and Candida albicans.
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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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J. Org. Chem., 1999, 64 (7):2331–9.
Rubrosides A−H, New Bioactive Tetramic Acid Glycosides from the Marine Sponge Siliquariaspongia japonica1[Reference:
WebLink]
METHODS AND RESULTS:
Eight new tetramic acid glycosides named rubrosides A-H(rubroside A,rubroside B, rubroside C, rubroside D, rubroside E, rubroside F, Rubroside G, Rubroside H) have been isolated from the marine sponge Siliquariaspongia japonica. Their structures were elucidated on the basis of spectral data as tetramic acid glycosides containing polyenes terminating in a 4-chloro-2-methyltetrahydrofuran ring. The absolute stereochemistry of the furan functionality in the two major metabolites, rubrosides D and F, was determined by the NMR method using chiral anisotropic reagents for tetrahydro-2-furoic acid derived by RuO4 oxidation. The absolute stereochemistry of tetramic acid and of the sugar moieties in all rubrosides was deduced by chiral GC analysis of chemical degradation products. The rubrosides induced numerous large intracellular vacuoles in 3Y1 rat fibroblasts at concentrations of 0.5−1.0 μg/mL, and rubrosides A, C, D, and E were cytotoxic against P388 murine leukemia cells with IC50 values of 0.046−0.21 μg/mL.
CONCLUSIONS:
Most rubrosides show antifungal activity against Aspergillus fumigatus and Candida albicans.
