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| 10mg |
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| Targets |
As an analytical standard, normetanephrine-d3 hydrochloride is not used for studying biological targets. However, the non-deuterated parent compound (normetanephrine) primarily interacts with adrenergic receptors and enzymes involved in catecholamine metabolism. Normetanephrine is a metabolite of norepinephrine and is used as a biomarker of sympathetic nervous system activity. It does not have significant pharmacological activity at therapeutic doses.
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| ln Vitro |
Drug compounds have included stable heavy isotopes of carbon, hydrogen, and other elements, mostly as quantitative tracers while the drugs were being developed. Because deuteration may have an effect on a drug's pharmacokinetics and metabolic properties, it is a cause for concern [1].
As a stable isotope-labeled compound, normetanephrine-d3 hydrochloride is not used for activity studies. The non-deuterated parent compound, normetanephrine, is a metabolite of norepinephrine and can be detected in biological fluids. Its concentration reflects the activity of the sympathetic nervous system and catecholamine metabolism. No intrinsic therapeutic activity is attributed to normetanephrine itself. |
| ln Vivo |
In vivo, normetanephrine (non-deuterated) is a naturally occurring metabolite of norepinephrine. Its levels in plasma and urine are used as diagnostic biomarkers for pheochromocytoma and other catecholamine-secreting tumors. Elevated levels of plasma-free metanephrines (normetanephrine and metanephrine) are highly sensitive and specific for the diagnosis of pheochromocytoma. Normetanephrine-d3 hydrochloride is not used for in vivo efficacy studies; it is used as an internal standard to quantify normetanephrine levels.
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| Enzyme Assay |
For non-cellular assays (analytical quantification), normetanephrine-d3 hydrochloride is prepared as a stock solution in methanol or water (1 mg/mL). For LC-MS/MS analysis, a calibration curve for normetanephrine is prepared in human plasma or urine (0.1-100 ng/mL) with a fixed concentration of normetanephrine-d3 hydrochloride (e.g., 10 ng/mL). Sample preparation: 500 uL plasma + 50 uL internal standard + 1 mL acetonitrile for protein precipitation. After centrifugation, the supernatant is evaporated to dryness, reconstituted in 100 uL mobile phase (0.1% formic acid in water:acetonitrile), and injected onto a C18 column (2.1×100 mm, 1.8 um).
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| Cell Assay |
For cell-based assays, cell culture medium can be collected from cells treated with norepinephrine or other catecholamines. Cells (e.g., PC12 pheochromocytoma cells) are cultured in DMEM with 10% FBS. Norepinephrine (10-100 uM) is added to the medium, and normetanephrine production (via COMT activity) is measured by LC-MS/MS using normetanephrine-d3 as an internal standard. COMT activity can be assessed by measuring the conversion of norepinephrine to normetanephrine.
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| Animal Protocol |
For in vivo animal experiments, normetanephrine-d3 hydrochloride is not administered as a drug. For pharmacokinetic studies, normetanephrine-d3 can be administered to rats as a tracer (e.g., intravenous injection of 0.1-1 mg/kg). Blood samples are collected over time, and the deuterated compound is quantified by LC-MS/MS to study its metabolism and excretion. For diagnostic studies, normetanephrine-d3 is used as an internal standard to measure endogenous normetanephrine levels in plasma and urine samples from animal models of pheochromocytoma (e.g., rats implanted with catecholamine-secreting tumors).
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| ADME/Pharmacokinetics |
Normetanephrine-d3 hydrochloride has a molecular formula of C₉H11D3ClNO3 and a molecular weight of approximately 222.68. The compound is a white to off-white solid powder. It is soluble in water, DMSO, and ethanol. The hydrochloride salt form improves water solubility and stability. It should be stored as a powder at -20degC, sealed and protected from moisture and light. The deuterium labeling (three deuterium atoms) provides a mass shift of +3 Da, enabling clear differentiation from endogenous (non-deuterated) normetanephrine in mass spectrometry.
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| Toxicity/Toxicokinetics |
Normetanephrine-d3 hydrochloride is a stable isotope-labeled compound with minimal toxicity at analytical concentrations. The non-deuterated parent compound, normetanephrine, is an endogenous metabolite and is generally non-toxic at physiological levels. Standard laboratory safety precautions for handling organic compounds should be followed. No acute toxicity studies have been reported for the deuterated version.
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| References | |
| Additional Infomation |
Normetanephrine-d3 hydrochloride is an analytical standard and research tool, not an approved drug. No clinical trials have been conducted with the deuterated version. The non-deuterated parent compound, normetanephrine (as a metabolite), is used as a diagnostic biomarker for pheochromocytoma in clinical medicine (plasma-free metanephrines test). The deuterated internal standard is used in clinical diagnostic laboratories to improve the accuracy and precision of LC-MS/MS-based quantification of normetanephrine in patient samples. It is also used in research to study catecholamine metabolism, COMT enzyme activity, and sympathetic nervous system function. The compound is not intended for human therapeutic use.
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| Molecular Formula |
C9H11D3CLNO3
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|---|---|
| Molecular Weight |
222.68
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| Exact Mass |
222.085
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| CAS # |
1085333-97-6
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| Related CAS # |
Normetanephrine hydrochloride;1011-74-1
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| PubChem CID |
71751227
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| Appearance |
White to off-white solid powder
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| LogP |
1.895
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| Hydrogen Bond Donor Count |
4
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| Hydrogen Bond Acceptor Count |
4
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| Rotatable Bond Count |
3
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| Heavy Atom Count |
14
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| Complexity |
154
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| Defined Atom Stereocenter Count |
0
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| SMILES |
[2H]C([2H])(C([2H])(C1=CC(=C(C=C1)O)OC)O)N.Cl
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| InChi Key |
VKFPRGQZWKTEON-IJJJTAPTSA-N
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| InChi Code |
InChI=1S/C9H13NO3.ClH/c1-13-9-4-6(8(12)5-10)2-3-7(9)11;/h2-4,8,11-12H,5,10H2,1H3;1H/i5D2,8D;
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| Chemical Name |
4-(2-amino-1,2,2-trideuterio-1-hydroxyethyl)-2-methoxyphenol;hydrochloride
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| HS Tariff Code |
2934.99.9001
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| Storage |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month Note: Please store this product in a sealed and protected environment, avoid exposure to moisture. |
| Shipping Condition |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
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| Solubility (In Vitro) |
May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples
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| Solubility (In Vivo) |
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.
Injection Formulations
Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline)(e.g. IP/IV/IM/SC) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). View More
Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). View More
Oral Formulation 3: Dissolved in PEG400 (Please use freshly prepared in vivo formulations for optimal results.) |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 4.4907 mL | 22.4537 mL | 44.9075 mL | |
| 5 mM | 0.8981 mL | 4.4907 mL | 8.9815 mL | |
| 10 mM | 0.4491 mL | 2.2454 mL | 4.4907 mL |
*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.
Calculation results
Working concentration： mg/mL；
Method for preparing DMSO stock solution： mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.
Method for preparing in vivo formulation:：Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O，mix and clarify.
(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.
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