Rehmapicroside
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.
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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Acta Pharmaceutica Sinica B,2013,3(5): 333–336.
A new megastigmane from fresh roots of Rehmannia glutinosa[Reference:
WebLink]
METHODS AND RESULTS:
A new megastigmane, rehmamegastigmane (1), together with eighteen known compounds lariciresinol (2), lariciresinol-4′-O-β-d-glucopyranoside (3), hierochin D (4), yemuoside YM1 (5), darendoside B (6), decaffeoylacteoside (7), jionoside B1 (8), catalpol (9), ajugol (10), 6-O-vanilloylajugol (11), 6-O-E-feruloylajugol (12), Rehmapicroside (13), rehmapicrogenin (14), 3-methoxy-2,6,6-trimethylcyclohexane-1-enecarboxylic acid (15), vanillic acid (16), hydroferulic acid (17), threo-1-(4-hydroxy-3-methoxyphenyl)-1,2,3-propanetriol (18), p-hydroxyphenylethyl alcohol (19) was isolated from the fresh roots of Rehmannia glutinosa.
CONCLUSIONS:
Compounds 2–6 and 16–18 were isolated from this plant for the first time.
Nat Prod Res. 2015;29(1):59-63.
Two new ionone glycosides from the roots of Rehmannia glutinosa Libosch.[Pubmed:
25232801]
METHODS AND RESULTS:
Two new ionone glycosides, named frehmaglutoside G (1) and frehmaglutoside H (2), together with six known compounds, Rehmapicroside (3), sec-hydroxyaeginetic acid (4), dihydroxy-β-ionone (5), trihydroxy-β-ionone (6), rehmaionoside A (7) and rehmaionoside C (8), were isolated from the 95% EtOH extract of the dried roots of Rehmannia glutinosa Libosch.
CONCLUSIONS:
Their structures were determined on the basis of extensive spectroscopic analyses, including HR-ESI-MS, UV, IR, 1D and 2D NMR ((1)H-(1)H COSY, HSQC, HMBC and NOESY) methods. The absolute configurations were confirmed via the circular dichroism spectra.
