Isorauhimbine
3-Epi-alpha-yohimbine(Isorauhimbine) has alpha adrenoceptor blocking activities,it also has cardiovascular effects.
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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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N.-S. Arch.Pharmacol., 1981, 315(3):227-31.
Yohimbine diastereoisomers: cardiovascular effects after central and peripheral application in the rat.[Pubmed:
7219571]
METHODS AND RESULTS:
The cardiovascular effects of four yohimbine diastereoisomers, yohimbine, rauwolscine, corynanthine, and 3-epi-alpha-yohimbine(Isorauhimbine) , were compared in urethane-anaesthetized and conscious, normotensive Sprague-Dawley rats.
Intravenous cumulative infusions (10--500 microgram) of the drugs to anaesthetized rats decreased blood pressure and blunted the pressor response to intravenous adrenaline injections.
Corynanthine was the most potent isomer in this regard, followed by yohimbine, rauwolscine, and 3-epi-alpha-yohimbine. Depressor responses following intravenous bolus doses (40 microgram) showed a similar ranking. Intraventricular injections of yohimbine to anaesthetized rats decreased blood pressure dose-dependently, as did injections of corynanthine and rauwolscine. Responses indicated the ranking to be yohimbine greater or equal to rauwolscine greater than corynanthine for this effect at the 40 microgram dose. Heart rate was also decreased by these isomers, but not in a dose-dependent fashion. In conscious rats, the intraventricular injection of these isomers (20 microgram) increased blood pressure and heart rate. No differences were noted in terms of blood pressure responses; but, in causing tachycardia, the ranking was rauwolscine greater than yohimbine greater than corynanthine.
CONCLUSIONS:
These data suggest that after intraventricular application in anaesthetized rats, the effects of these alpha-adrenoceptor blockers are related to their individual affinity for the alpha 2 adrenoceptor.
Natural Product Research & Development,2007,19(2):235.
Indole Alkaloids from Rauwolfia vomitoria。[Reference:
WebLink]
METHODS AND RESULTS:
Fifteen indole alkaloids were isolated from the roots of Rauwolfia vomitoria. On the basis of spectroscopic evidence, their structures were identified as reserpine (1), tetrahydroalstonine (2), isosandwicine (3), methyl reserpate (4) ,ajmaline (5) , sandwicine (6) ,Isorauhimbine (7) , perakine (8) , α-yohimbine (9) , yohimbine (10) , mitoridine (11) ,tetraphyllicine (12), harman (13) ,mauiensine (14), and 12-hydroxymauiensine (15).
CONCLUSIONS:
Compounds 13 ∼ 15 were isolated from this plant for the first time.
