nuclear receptor raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2026-02-18. Anything still debated is marked as such rather than presented as settled.
Analytical identification of SR9009 typically relies on liquid chromatography coupled with tandem mass spectrometry. In biological samples, researchers first separate the compound from matrix components using protein precipitation, liquid-liquid extraction, or solid-phase extraction. High-performance liquid chromatography with ultraviolet detection and nuclear magnetic resonance spectroscopy can support structural confirmation of reference materials. Because SR9009 is a small, relatively lipophilic molecule, reverse-phase columns and acidic mobile phases are common. Laboratories often include isotope-labeled internal standards to improve quantification and to correct for ion suppression.
Stability depends on physical form, temperature, light exposure, and solvent. Solid SR9009 is generally stored cold and dry, with protection from light to limit degradation. Dimethyl sulfoxide stocks are common for laboratory work, but repeated freeze-thaw cycles can reduce compound integrity. Aqueous solutions may be less stable than organic stocks, and the ethyl ester in the structure can be susceptible to hydrolysis under certain conditions. Researchers typically validate storage conditions and recheck purity before quantitative experiments, especially when using archived material.
Handling practices for SR9009 focus on minimizing degradation and contamination. The solid is generally stored desiccated at or below -20 °C, protected from light and moisture. Stock solutions are often prepared in dimethyl sulfoxide or ethanol, then aliquoted to avoid repeated freeze–thaw cycles. Aqueous solubility is low, so formulations for animal studies may require cosolvents or suspending agents. Personnel should follow institutional chemical safety procedures, because toxicological data for humans are incomplete.
Regulatory status varies by country and intended use. Major drug agencies have not granted marketing authorization for SR9009 as a medicine, and it is not listed as a controlled substance in many jurisdictions. It is often sold as a research chemical, a category that may fall outside pharmaceutical manufacturing rules. Buyers should verify local laws and supplier documentation, including certificates of analysis. The lack of standardized quality controls raises concerns about identity, purity, and actual content in products marketed online.
In laboratory settings, SR9009 is commonly identified by its molecular structure and its interaction with REV-ERB receptors. Vendors may list it under synonyms such as Stenabolic or REV-ERB agonist, but those names do not define purity or identity. Analytical confirmation typically uses high-performance liquid chromatography with ultraviolet detection or liquid chromatography–mass spectrometry. A reference standard is needed to compare retention time and mass spectrum, because the compound can be confused with related research chemicals.
| Property | Value | Notes |
|---|---|---|
| Common synonyms | SR9009; Stenabolic | Nickname is not a chemical name. |
| Typical analytical method | LC-MS/MS | Often with isotope-labeled internal standard. |
| Storage temperature | -20 °C | Desiccated and protected from light. |
| Solution stability | DMSO stock; avoid freeze-thaw | Store at -20 to -80 °C. |
| Regulatory status | Not approved; varies by country | May be restricted as research chemical. |
Regulatory and sporting contexts treat SR9009 as a prohibited substance in many elite competitions. Its presence on banned lists reflects concerns about performance enhancement and unknown long-term safety. Analytical chemists have developed methods to detect the parent compound and its metabolites in urine and blood. Literature discussions distinguish between in vitro potency, animal pharmacology, and anecdotal human reports. The latter are difficult to verify because products sold online may lack purity or contain different compounds.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. These receptors help regulate circadian rhythms, lipid metabolism, and inflammatory gene expression. In cell and animal experiments, SR9009 alters transcription of clock-controlled genes and metabolic pathways. The compound is not a hormone and does not resemble classical steroid structures. Its activity depends on binding to the ligand-binding domain of REV-ERB, where it can modify corepressor recruitment.
Research interest in SR9009 grew from studies of circadian biology and metabolic disease. Preclinical reports describe effects on exercise capacity, muscle metabolism, and blood lipid levels in rodents, but these findings come from controlled laboratory settings. The compound has low oral bioavailability in animals, which limits systemic exposure after swallowing. Investigators often use injected routes in experiments to achieve measurable plasma concentrations. Human clinical data are sparse, no approved therapeutic product exists, and whether animal effects translate to humans remains an open question.
SR9009 is frequently discussed alongside other REV-ERB ligands, including synthetic agonists and natural heme-related molecules. Its selectivity for REV-ERB over related nuclear receptors has been measured in binding and reporter assays, though off-target activity at higher concentrations is possible. The compound is prohibited in sport by the World Anti-Doping Agency, and it is not approved for any medical use in major jurisdictions. Products sold online may be labeled as research chemicals, and their identity and purity are not guaranteed by regulatory review.
SR9009 is a synthetic small molecule that acts on the nuclear receptors REV-ERBα and REV-ERBβ. These receptors are part of the circadian clock machinery and normally repress transcription of certain target genes. In laboratory research, SR9009 is used as a chemical tool to study how REV-ERB activity influences metabolism, inflammation, and daily biological rhythms. The compound is not an approved medicine, and its effects in humans remain largely uncharacterized. It is often described as an investigational agent rather than a therapeutic product.
Several misconceptions surround SR9009. It is often described as a SARM, a steroid, or an exercise pill, but its known target is the REV-ERB receptor family. Rodent studies have examined exercise capacity and metabolic markers, yet human outcomes remain unproven. Oral bioavailability appears low in animals, and human pharmacokinetics are not well characterized. Online products may contain impurities or different compounds, so identity and purity testing are important for research use.
Analytical chemists detect SR9009 with liquid chromatography-tandem mass spectrometry, commonly abbreviated LC-MS/MS. Sample preparation may involve protein precipitation, liquid-liquid extraction, or solid-phase extraction before analysis. Laboratories can target the parent compound or its metabolites, depending on the matrix and the purpose of testing. Anti-doping methods require sensitive and specific assays because concentrations in biological samples can be low. Reference standards and validated methods are essential for reliable identification and quantification.
Regulatory agencies have not approved SR9009 for human therapeutic use. It is typically sold as a research chemical with labels stating that it is not for human consumption. The World Anti-Doping Agency prohibits the substance in sport, generally under the category of non-approved substances. Customs and national laws may restrict importation, sale, or possession. Product quality and legal status can vary by country and vendor, and therapeutic claims are not permitted in regulated advertising because the compound lacks approval.
Because REV-ERB receptors are core clock components, SR9009 has been examined for effects on daily rhythms as well as metabolism. Research has explored whether the compound can shift or reinforce circadian gene expression in tissues such as liver and muscle. Some studies report improved metabolic markers in obese or diabetic mice, while others show context-dependent responses. Questions remain about which effects are direct, which are secondary to timing, and how they might differ across species.
SR9009 is a synthetic small molecule studied as an agonist of REV-ERB nuclear receptors. REV-ERB alpha and REV-ERB beta help regulate circadian rhythms and metabolic gene expression. In laboratory research, SR9009 has been used to probe how these receptors affect skeletal muscle, liver, and adipose tissue. The compound was identified in academic drug-discovery work and is often described in scientific literature by its chemical name and research code. It is not an approved medicine, and human clinical data remain limited or absent.
SR9009 binds REV-ERB receptors and alters their repressive activity on target genes. This action can change transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. In rodent studies, treated animals have shown changes in muscle oxidative capacity and exercise performance, though effects vary by dose, duration, and model. The precise molecular steps connecting receptor binding to whole-body outcomes are still an active area of investigation. Findings in animals do not automatically translate to humans.
=== Pharmacokinetics === NMT undergoes oxidative deamination by monoamine oxidase (MAO), particularly MAO-A, which preferentially metabolizes serotonin and tryptamine derivatives. The intermediate methylation state of NMT makes it a substrate for further N-methylation to DMT by amine N-methyltransferase (INMT).
=== Overall organization === Since a local-government reform in 2007, the general government organization in Denmark is carried out on three administrative levels: central government, regions, and municipalities. Regions administer mainly health care services, whereas municipalities administer primary education and social services. Municipalities in principle independently levy income and property taxes, but the scope for total municipal taxation and expenditure is closely regulated by annual negotiations between the municipalities and the Finance Minister of Denmark. At the central government level, the Ministry of Finance carries out the coordinating role of conducting economic policy. In 2012, the Danish parliament passed a Budget Law (effective from January 2014) which governs the over-all fiscal framework, stating among other things that the structural deficit must never exceed 0.5% of GDP, and that Danish fiscal policy is required to be sustainable, i.e. have a non-negative fiscal sustainability indicator. The Budget Law also assigned the role of independent fiscal institution (IFI, informally known as "fiscal watchdog") to the already-existing independent advisory body of the Danish Economic Councils.
The society – which only admitted men at the time – initially mistook Benett for a man due to her reputation as a scientist and her unusual first name, addressing her diploma of admission to "Dominum" (Master) Benett. 1840: Scottish fossil collector and illustrator Lady Eliza Maria Gordon-Cumming invited geologists Louis Agassiz, William Buckland and Roderick Murchison to examine her collection of fish fossils. Agassiz confirmed several of Gordon-Cumming's discoveries as new species. 1843: During a nine-month period in 1842–43, English mathematician Ada Lovelace translated Luigi Menabrea's article on Charles Babbage's newest proposed machine, the Analytical Engine. With the article, she appended a set of notes. Her notes were labelled alphabetically from A to G. In note G, she describes an algorithm for the Analytical Engine to compute Bernoulli numbers. It is considered the first published algorithm ever specifically tailored for implementation on a computer, and Ada Lovelace has often been cited as the first computer programmer for this reason. The engine was never completed, so her program was never tested. 1843: British botanist and pioneering photographer Anna Atkins self-published her book Photographs of British Algae, illustrating the work with cyanotypes. Her book was the first book on any subject to be illustrated by photographs. 1846: British zoologist Anna Thynne built the first stable, self-sustaining marine aquarium.
== Further reading == Rhodesians Never Die, Godwin, P. & Hancock, I., 1995. Baobab Books, Harare, Zimbabwe. Pollard, William C. A Career of Defiance: The Life of Ian Smith, Agusan River Publishing Co., 1992. Topeka, KS. McLaughlin, John . "Ian Smith and the Future of Zimbabwe," The National Review, October 30, 1981, pp. 2168–70. Facts on File, 1984 ed., p. 574.
Sources: en.wikipedia.org
NK1: SP > NKA > NKB NK2: NKA > NKB > SP NK3: NKB > NKA > SP Antagonists of neurokinin-1 (NK1) receptors (NK1 receptor antagonists), through which substance P acts, have been proposed to belong to a new class of antidepressants, while NK2 antagonists have been proposed as anxiolytics and NK3 antagonists have been proposed as antipsychotics.
In 1600 BCE, the Edwin Smith Papyrus, an Ancient Egyptian medical text, described the heart and its vessels, as well as the brain and its meninges and cerebrospinal fluid, and the liver, spleen, kidneys, uterus and bladder. It showed the blood vessels diverging from the heart. The Ebers Papyrus (c. 1550 BCE) features a "treatise on the heart", with vessels carrying all the body's fluids to or from every member of the body. The Hellenistic Egyptian city of Alexandria was the stepping-stone for Greek anatomy and physiology. Alexandria not only housed the biggest library for medical records and books of the liberal arts in the world during the time of the Greeks but was also home to many medical practitioners and philosophers. Great patronage of the arts and sciences from the Ptolemaic dynasty of Egypt helped raise Alexandria up, further rivalling other Greek states' cultural and scientific achievements.
In 2003, Joe Weider sold Weider Publications to American Media, Inc. (AMI). The position of president of the IFBB was filled by Rafael Santonja following the death of Ben Weider in October 2008. In 2004, contest promoter Wayne DeMilia broke ranks with the IFBB and AMI took over the promotion of the Mr. Olympia contest: in 2017 AMI took the contest outright. In the early 21st century, patterns of consumption and recreation similar to those of the United States became more widespread in Europe and especially in Eastern Europe following the collapse of the Soviet Union. This resulted in the emergence of whole new populations of bodybuilders from former Eastern Bloc states.
In early 1987, he persuaded 11 Doobie alumni to join him for a concert to benefit veterans' causes. Answering the call were Tom Johnston, Pat Simmons, Jeff Baxter, John McFee, John Hartman, Michael Hossack, Chet McCracken, Michael McDonald, Cornelius Bumpus, Bobby LaKind and Tiran Porter, plus their long-time record producer and good friend, Ted Templeman. There were no surplus bass players as Weeks had other commitments. They soon discovered that tickets were in great demand, so the concert quickly evolved into a 12-city tour that began on May 21, 1987, in San Diego. The third concert, held at the Hollywood Bowl, was reportedly the venue's fastest sell-out since the Beatles had played there just over 20 years earlier. The band performed selections from every album using a wide variety of instrumentation that they could not have previously duplicated onstage without the expanded lineup. Baxter and McFee played pedal steel and violin, respectively, during "Black Water" and "Steamer Lane Breakdown". "Without You" featured four drummers and four lead guitarists. Producer Ted Templeman played percussion and LaKind sometimes played Knudsen's drum set while Knudsen went to the front of the stage to join the chorus. Templeman also played the drum set on "What a Fool Believes", as he did on the original hit record. The tour culminated (sans McDonald, LaKind, McFee and Knudsen) at the Glasnost-inspired July 4 "Peace Concert" in Moscow, with Bonnie Raitt, James Taylor and Santana sharing the bill.
== Interactions == Prokinetic agents such as metoclopramide accelerate gastric emptying, shorten time (tmax) to paracetamol peak blood plasma concentration (Cmax), and increase Cmax. Medications slowing gastric emptying such as propantheline and morphine lengthen tmax and decrease Cmax. The interaction with morphine may result in patients failing to achieve the therapeutic concentration of paracetamol; the clinical significance of interactions with metoclopramide and propantheline is unclear. There have been suspicions that cytochrome inducers may enhance the toxic pathway of paracetamol metabolism to NAPQI (see Paracetamol#Pharmacokinetics). By and large, these suspicions have not been confirmed. Out of the inducers studied, the evidence of potentially increased liver toxicity in paracetamol overdose exists for phenobarbital, primidone, isoniazid, and possibly St John's wort. On the other hand, the anti-tuberculosis drug isoniazid cuts the formation of NAPQI by 70%. Ranitidine increased paracetamol area under the curve (AUC) 1.6-fold. AUC increases are also observed with nizatidine and cisapride. The effect is explained by these drugs inhibiting glucuronidation of paracetamol. Paracetamol raises plasma concentrations of ethinylestradiol by 22% by inhibiting its sulfation. Paracetamol increases INR during warfarin therapy and should be limited to no more than 2 g per week.
Sources: en.wikipedia.org
The most common approach is liquid chromatography-tandem mass spectrometry, often after extraction from blood, urine, or tissue. Ultraviolet detection and nuclear magnetic resonance spectroscopy are used mainly for reference material characterization. Isotope-labeled internal standards improve accuracy.
Solid material is usually kept at -20 °C, desiccated, and protected from light. Dimethyl sulfoxide stocks should be stored cold and subjected to minimal freeze-thaw cycles. Aqueous solutions are generally less stable and should be prepared fresh when possible.
Legality depends on the country and the intended use. It is not an approved medicine, and some places restrict or ban sales for human consumption. Buyers should verify local rules and product documentation before procurement.
Liquid chromatography–mass spectrometry is common for identity and purity checks. High-performance liquid chromatography with ultraviolet detection can also be used. Both methods require a suitable reference standard.