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(R)-(-)-α-Methylhistamine dihydrobromide
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Catalog No. T12630Cas No. 868698-49-1
(R)-(-)-α-Methylhistamine dihydrobromide is a potent, selective, and brain-penetrant agonist of the H3 histamine receptor with high receptor affinity, capable of enhancing memory retention and attenuating cognitive impairment in rat models, making it a valuable pharmacological probe for elucidating central histaminergic signaling and H3 receptor-mediated modulation of learning and memory processes.
(R)-(-)-α-Methylhistamine dihydrobromide
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Purity: 99.98%
Catalog No. T12630Cas No. 868698-49-1
(R)-(-)-α-Methylhistamine dihydrobromide is a potent, selective, and brain-penetrant agonist of the H3 histamine receptor with high receptor affinity, capable of enhancing memory retention and attenuating cognitive impairment in rat models, making it a valuable pharmacological probe for elucidating central histaminergic signaling and H3 receptor-mediated modulation of learning and memory processes.
| Pack Size | Price | USA Warehouse | Global Warehouse | Quantity |
|---|---|---|---|---|
| 1 mg | $40 | - | In Stock | |
| 5 mg | $92 | - | In Stock | |
| 10 mg | $147 | - | In Stock | |
| 25 mg | $297 | - | In Stock | |
| 50 mg | $442 | - | In Stock | |
| 100 mg | $638 | - | In Stock |
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In Stock Estimated shipping dateUSA Warehouse[1-2 days] Global Warehouse[5-7 days]
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Purity:99.98%
Appearance:Oil
Color:Transparent
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Product Introduction
Bioactivity
Chemical Properties
Storage & Solubility Information
| Description | (R)-(-)-α-Methylhistamine dihydrobromide is a potent, selective, and brain-penetrant agonist of the H3 histamine receptor with high receptor affinity, capable of enhancing memory retention and attenuating cognitive impairment in rat models, making it a valuable pharmacological probe for elucidating central histaminergic signaling and H3 receptor-mediated modulation of learning and memory processes. |
| Targets&IC50 | H3 receptor:50.3 nM (kd) |
| In vitro | (R)-(-)-α-Methylhistamine dihydrobromide is an H3-agonist with over 10 times the potency of histamine (HA). It exhibits weak affinities for H1 and H2 receptors, with pKi values of 4.8 and <3.5, respectively. The compound shows more than 1,000 times selectivity for H3-receptors compared to HA and over 200-fold selectivity over H4 receptors[1]. |
| In vivo | In mouse and rat models, intraperitoneal (i.p.) administration of (R)-(-)-α-Methylhistamine dihydrobromide (e.g., 6.3 mg/kg) decreases the steady-state levels of tele-methylhistamine (t-MH), a primary histamine metabolite, without changing total histamine levels. This indicates an inhibition of histamine turnover. In a rat model of anesthesia-induced amnesia, pretreatment with 10 mg/kg (i.p.) reverses memory retention deficits caused by Propofol [2][3][4]. |
| Molecular Weight | 287 |
| Formula | C6H13Br2N3 |
| Cas No. | 868698-49-1 |
| Smiles | C[C@@H](N)CC1=CN=CN1.Br.Br |
| Relative Density. | no data available |
| Storage | In solvent: -80°C for 1 year | Shipping with blue ice/Shipping at ambient temperature. |
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In Vivo Formulation Calculator (Clear solution)
Please enter your animal experiment information in the following box and click Calculate to obtain the stock solution preparation method and in vivo formula preparation method:
For example, if the intended dosage is 10 mg/kg for animals weighing 20 g , with a dosing volume of 100 μL per animal, and a total of 10 animals are to be administered, using a formulation of 
10% DMSO+ 40% PEG300+ 5% Tween 80+ 45% Saline/PBS/ddH2O , the resulting working solution concentration would be 2 mg/mL.Stock Solution Preparation:
Dissolve 2 mg of the compound in 100 μL DMSO to obtain a stock solution at a concentration of 20 mg/mL . If the required concentration exceeds the compound's known solubility, please contact us for technical support before proceeding.
Preparation of the In Vivo Formulation:
1) Add 100 μL of the DMSO stock solution to 400 μL PEG300 and mix thoroughly until the solution becomes clear.
2) Add 50 μL Tween 80 and mix well until fully clarified.
3) Add 450 μL Saline,PBS or ddH2O and mix thoroughly until a homogeneous solution is obtained.
This example is provided solely to demonstrate the use of the In Vivo Formulation Calculator and does not constitute a recommended formulation for any specific compound. Please select an appropriate dissolution and formulation strategy based on your experimental model and route of administration.
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Please see Inhibitor Handling Instructions for more frequently ask questions. Topics include: how to prepare stock solutions, how to store products, and cautions on cell-based assays & animal experiments, etc
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