Rhein-8-glucoside calcium salt
Rhein-8-O-beta-D-glucopyranoside(Rhein-8-glucoside calcium salt) shows moderate bioactivity against human Protein Tyrosine Phosphatase 1B (hPTP1B) in vitro.
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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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PTP1B inhibitors from Saussrurea lappa.[Pubmed:
16864436 ]
METHODS AND RESULTS:
A new lignan glycoside, named 1,5-dihydroxypinoresinol-4'-O-beta-d-glucopyranoside (1), has been isolated from the EtOH extract of the roots of Saussurea lappa, together with twenty known compounds: (+)-1-hydroxypinoresinol-1-O-beta-D-glucopyranoside (2), fraxiresinol-4'-O-beta-D-glucopyranoside (3), (-)-olivil-4''-O-beta-D-glucopyranoside (4), 4-allyl-2,6-dimethoxybenzene-1-O-beta-D-glucopyranoside, syringin, costunolide-15-O-beta-D-glucopyranoside, chlorogenic acid, aloe-emodin-8-O-beta-D-glucopyranoside (5), rhein-8-O-beta-D-glucopyranoside (Rhein-8-glucoside calcium salt),6), chrysophanol (7), emodin, dehydrocostus lactone, costunolide, beta-costic acid, reynosin, arbusculin A, alpha-cyclocostunolide, beta-cyclocostunolide, santamarine and magnolialide.
CONCLUSIONS:
Three anthraquinones (5-7) showed moderate bioactivity against human Protein Tyrosine Phosphatase 1B (hPTP1B) in vitro.
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