A practical reference on Stenabolic: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2026-05-10. Anything still debated is marked as such rather than presented as settled.
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.
REV-ERB proteins typically suppress gene expression by recruiting corepressor complexes to DNA response elements. SR9009 binds these receptors and strengthens that repressive action in cell-based assays. Studies in rodents have reported changes in lipid handling, mitochondrial function, and exercise capacity after treatment. Such findings are often cited as evidence for metabolic effects, but species differences and limited pharmacokinetic data make direct translation to humans uncertain. Researchers continue to examine which effects are robust and which depend on specific experimental conditions.
Identity and purity of SR9009 samples are usually checked with chromatographic and spectrometric methods. High-performance liquid chromatography can separate the compound from related impurities, while mass spectrometry provides molecular mass confirmation. Nuclear magnetic resonance spectroscopy may be used for structural verification in research settings. No single method proves biological activity, and certificates of analysis should be reviewed alongside raw data. Independent testing is often needed because online products vary widely.
SR9009 stability depends on temperature, moisture, light, and solvent. Solid material is generally kept cool and dry, while solutions may require protection from repeated warming and cooling. Degradation can appear as color changes, precipitate, or new chromatographic peaks. Researchers should follow supplier instructions and their own stability data. Long-term storage conditions for human use have not been established because the compound lacks approved clinical formulation.
| Property | Value | Notes |
|---|---|---|
| Common name | SR9009 | Also marketed informally as Stenabolic |
| Chemical class | Synthetic REV-ERB agonist | Binds REV-ERBα and REV-ERBβ |
| Molecular formula | C24H30ClN3O4S | Approximate molecular weight 492 g/mol |
| CAS Registry Number | 1379686-30-2 | Identifier for the parent compound |
| Regulatory status | Not approved for human use | Prohibited in sport by WADA |
Laboratory identification of SR9009 typically relies on chromatographic separation coupled to mass spectrometry, often with ultraviolet detection as a secondary check. Nuclear magnetic resonance spectroscopy can confirm molecular structure when a reference standard is available. Because many suppliers sell the compound as a research chemical, independent identity testing is important for experimental reproducibility. A single retention time is not sufficient proof of identity, especially when related compounds may be present. Purity assessments usually report a percentage based on area normalization.
SR9009 is generally described as poorly soluble in water and more soluble in organic solvents such as dimethyl sulfoxide and ethanol. Stock solutions are commonly prepared in an organic solvent before dilution into an aqueous buffer or vehicle. Precipitation can occur if the organic fraction is reduced too quickly or if the final concentration exceeds the compound's solubility limit. Sonication or gentle warming may aid dissolution in some protocols, but excessive heat can promote degradation. Container material and pH can also influence observed solubility.
For long-term storage, SR9009 is typically kept as a solid at low temperature, protected from moisture and light. Desiccated conditions limit hydrolysis, while opaque containers reduce photochemical breakdown. Solutions are less stable than solids and are often stored frozen in aliquots to avoid repeated freeze-thaw cycles. Stability data are not standardized across all suppliers, so users should rely on certificate-of-analysis information when available. Degradation may appear as color change, precipitate, or decreased chromatographic purity.
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.
Regulatory treatment of SR9009 varies by country and region. It is not approved as a pharmaceutical, and several jurisdictions restrict its sale for human consumption. Some authorities classify it as a research chemical, a prescription-only substance, or a prohibited performance-enhancing agent in sport. Purchasers may encounter certificates of analysis, but these documents do not guarantee identity, purity, or legality. In research settings, institutional safety reviews and controlled procurement help ensure that materials are handled under appropriate oversight. The absence of harmonized rules means that legal status can change and requires verification.
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.
=== Historical development of fluid mechanics === The study of fluid mechanics goes back at least to the days of ancient Greece, when Archimedes investigated fluid statics and buoyancy and formulated his famous law known now as the Archimedes' principle, which was published in his work On Floating Bodies—generally considered to be the first major work on fluid mechanics. Iranian scholar Abu Rayhan Biruni and later Al-Khazini applied experimental scientific methods to fluid mechanics. Rapid advancement in fluid mechanics began with Leonardo da Vinci (observations and experiments), Evangelista Torricelli (invented the barometer), Isaac Newton (investigated viscosity) and Blaise Pascal (researched hydrostatics, formulated Pascal's law), and was continued by Daniel Bernoulli with the introduction of mathematical fluid dynamics in Hydrodynamica (1739) and Leonhard Euler's equations for ideal fluid dynamics.
== Function == Thymosin α1 is an agonist for toll-like receptor 2 and toll-like receptor 9 on both myeloid and dendritic antigen-presenting cells, thereby stimulating the adaptive immune response. Thymosin α1 is believed to be a major component of Thymosin Fraction 5 responsible for the activity of that preparation in restoring immune function in animals lacking thymus glands. It has been found to enhance cell-mediated immunity in humans as well as experimental animals.
Next to be linked to regulation were Xist and other long noncoding RNAs associated with X chromosome inactivation. Their roles, at first mysterious, were shown by Jeannie T. Lee and others to be the silencing of blocks of chromatin via recruitment of Polycomb complex so that messenger RNA could not be transcribed from them. Additional lncRNAs, currently defined as RNAs of more than 200 base pairs that do not appear to have coding potential, have been found associated with regulation of stem cell pluripotency and cell division.
The old European empires collapsed or they were dismantled as a direct result of the crushing costs of the war and in some cases, their fall was caused by the defeat of imperial powers. The United States became firmly established as the dominant global superpower, along with its close competitor and ideological foe, the Soviet Union. The two superpowers exerted political influence over most of the world's nation-states for decades after the end of the Second World War. The modern international security, economic, and diplomatic system was created in the aftermath of the war. Institutions such as the United Nations were established to collectivize international affairs, with the explicit goal of preventing another outbreak of general war. The wars had also greatly changed the course of daily life. Technologies developed during wartime had a profound effect on peacetime life as well, such as through advances in jet aircraft, penicillin, nuclear energy, and electronic computers.
Sources: en.wikipedia.org
== Career and research == Tschöp obtained an M.D. from LMU Munich (1993), where he worked as a clinician (1994–1998) in neuroendocrinology before accepting a research fellowship at the Eli Lilly Discovery Research Laboratories (1999–2002) and leading a research team at the German Institute of Human Nutrition (Potsdam/Nuthetal 2002–2003). He was a Professor of Endocrinology and Diabetes at the Metabolic Diseases Institute of the University of Cincinnati (2003–2009), before being named the Arthur Russell Morgan Endowed Chair of Medicine, and Research Director of the Metabolism Center of Excellence for Diabetes and Obesity at the University of Cincinnati (2009–2011). He was Research Director of the Helmholtz Diabetes Center and Director of the Institute for Diabetes and Obesity at Helmholtz Zentrum München (2011–2018). Early in his career, Tschöp reported on the orexigenic, adipogenic, and metabolic effects of ghrelin and its secretory control by nutrients, which has had a major influence on human obesity and diabetes research. His corresponding publication in Nature is among today's most frequently cited metabolism research papers. It added a fundamental pathway to the current model of body weight and glucose control and established novel drug targets for metabolic diseases. Tschöp went on to further dissect gut-brain communication pathways, based on GI-hormone signaling and lessons from unraveling the molecular underpinnings of gastric bypass surgery.
A pulmonary embolism is a blood clot that becomes lodged in the pulmonary arteries. The majority of emboli arise because of deep vein thrombosis in the legs. Pulmonary emboli may be investigated using a ventilation/perfusion scan, a CT scan of the arteries of the lung, or blood tests such as the D-dimer. Pulmonary hypertension describes an increased pressure at the beginning of the pulmonary artery that has a large number of differing causes. Other rarer conditions may also affect the blood supply of the lung, such as granulomatosis with polyangiitis, which causes inflammation of the small blood vessels of the lungs and kidneys. A lung contusion is a bruise caused by chest trauma. It results in hemorrhage of the alveoli causing a build-up of fluid which can impair breathing, and this can be either mild or severe. The function of the lungs can also be affected by compression from fluid in the pleural cavity pleural effusion, or other substances such as air (pneumothorax), blood (hemothorax), or rarer causes. These may be investigated using a chest X-ray or CT scan, and may require the insertion of a surgical drain until the underlying cause is identified and treated.
=== ICD-11 === Anorexia nervosa is classified under feeding or eating disorders in both the ICD-11 and the DSM-5. Like the DSM-5, the ICD-11 also distinguishes between a binge-purge pattern and a restricting pattern with further subcodes.
Sources: en.wikipedia.org
Most cases of SCID are due to mutations in the IL2RG gene encoding the common gamma chain (γc) (CD132), a protein that is shared by the receptors for interleukins IL-2, IL-4, IL-7, IL-9, IL-15 and IL-21. These interleukins and their receptors are involved in the development and differentiation of T and B cells. Because the common gamma chain is shared by many interleukin receptors, mutations that result in a non-functional common gamma chain cause widespread defects in interleukin signalling. The result is a near complete failure of the immune system to develop and function, with low or absent T cells and NK cells and non-functional B cells.The common gamma chain is encoded by the gene IL-2 receptor gamma, or IL-2Rγ, which is located on the X-chromosome. For this reason, immunodeficiency caused by mutations in IL-2Rγ is known as X-linked severe combined immunodeficiency. The condition is inherited in an X-linked recessive pattern.
=== In development === During embryonic development, many cells die via apoptosis and other cell death pathways for various purposes including morphogenesis tissue sculpting, controlling cell numbers, and quality control. In 2024, it was found that ferroptosis plays a role in normal physiology during embryonic development and muscle remodelling, propagating in millimeter-length waves through the developing avian limb. The exact pro-ferroptotic signal that is transmitted between cells and the manner by which these ferroptotic waves are bounded remain to be characterized.
Stephen H. White was an American Biophysicist, academic, and author. He was a Professor Emeritus of Physiology and Biophysics at the University of California, Irvine School of Medicine. White published over 350 papers, was cited over 30,000 times, and had a Google Scholar H-index of 84. He focused his research on structure and folding of membrane proteins, with particular attention on protein structure prediction, peptide–bilayer interactions, cell membrane biophysics, structure of membranes and lipid bilayers, and antimicrobial peptides. He was awarded the 2014 Carl Brändén Award for his contributions to the field of membrane protein folding. He authored several book chapters and two books entitled, Membrane Protein Structure: Experimental Approaches and Cell Boundaries: How Membranes and Their Proteins Work. White was a Fellow of the American Association for the Advancement of Science, Neutron Scattering Society of America, and Biophysical Society, where he also served as President (1996-1997). He served on numerous advisory boards of several professional organizations, including NIH, NSF, Department of Energy, and European Science Foundation.
On 18 July 1966, the ICJ ruled that it had no authority to decide on the South West African affair. Furthermore, the court found that while Ethiopia and Liberia had locus standi to institute proceedings on the matter, neither had enough vested legal interest in South West Africa to entitle them to a judgement of merits. This ruling was met with great indignation by SWAPO and the OAU. SWAPO officials immediately issued a statement from Dar es Salaam declaring that they now had "no alternative but to rise in arms" and "cross rivers of blood" in their march towards freedom. Upon receiving the news, SWALA escalated its insurgency. Its third group, which had infiltrated Ovamboland in July, attacked white-owned farms, traditional Ovambo leaders perceived as South African agents, and a border post. The guerrillas set up camp at Omugulugwombashe, one of five potential bases identified by SWALA's initial reconnaissance team as appropriate sites to train future recruits. Here, they drilled up to thirty local volunteers between September 1965 and August 1966. South African intelligence became aware of the camp by mid 1966 and identified its general location. On 26 August 1966, the first major clash of the conflict took place when South African paratroops and paramilitary police units executed Operation Blouwildebees to capture or kill the insurgents. SWALA had dug trenches around Omugulugwombashe for defensive purposes, but was taken by surprise and most of the insurgents quickly overpowered. SWALA suffered 2 dead, 1 wounded, and 8 captured; the South Africans suffered no casualties.
Sources: en.wikipedia.org
SR9009 is a synthetic research compound that binds and modulates the nuclear receptors REV-ERBα and REV-ERBβ. It is used in laboratory studies of circadian biology and metabolism, not as an approved medicine. It is also known by the informal name Stenabolic.
No. SR9009 has not been approved as a therapeutic drug in the United States, European Union, or other major markets. Human safety and efficacy data are very limited. Its presence in consumer products does not imply regulatory approval.
The World Anti-Doping Agency lists SR9009 as a prohibited substance because it can alter gene expression and metabolic pathways relevant to performance. The ban applies at all times, not only during competition. Detection relies on laboratory methods such as mass spectrometry.
Laboratories commonly use liquid chromatography coupled with mass spectrometry to detect SR9009. The method can identify the compound and estimate concentration in a sample. Detection limits depend on the matrix and instrument.