This is a working overview of research chemical, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2025-12-20 and is reviewed periodically as new material appears.
At the molecular level, SR9009 binds the ligand-binding domain of REV-ERB and strengthens recruitment of corepressor proteins such as NCoR and HDAC3. This increases repression of target genes, including Bmal1 and other clock-controlled and metabolic genes. In rodent studies, such changes have been linked to altered lipid handling, glucose metabolism, and energy expenditure. The precise chain of events between receptor binding and whole-body effects remains an active area of research. Findings in animals do not automatically translate to humans.
Laboratory studies often administer SR9009 by injection because oral absorption appears poor in rodents. Reported pharmacokinetic properties include rapid metabolism and low systemic exposure after oral dosing. Human pharmacokinetic data are sparse, so absorption, distribution, metabolism, and excretion in people are not well defined. Some research explores related REV-ERB compounds with improved drug-like properties. Regulatory approval for any REV-ERB agonist as a human medicine has not been granted to date.
Analytical methods for SR9009 typically rely on liquid chromatography coupled with tandem mass spectrometry. The technique can separate the parent compound from related substances and detect low concentrations in biological matrices. Urine and blood are common samples in anti-doping testing, while in vitro studies may use cell culture media. Rapid metabolism and low expected concentrations make method validation important for reliable identification. Exact metabolite patterns can vary by species and are not fully mapped.
Regulatory treatment of SR9009 reflects its investigational status. The compound has no approved human therapeutic indication, and sports authorities prohibit its use. It appears on anti-doping lists as a non-approved substance or metabolic modulator, depending on the list version. Products sold online as research chemicals are not quality-controlled medicines, so their identity and purity can differ from the label. Such products may also contain unlisted compounds, which complicates both testing and safety assessment.
Scientific discussion of SR9009 often separates animal evidence from human anecdote. Rodent studies provide controlled data on endurance, metabolism, and gene expression, but they use specific strains, doses, and treatment durations. Human reports are mostly uncontrolled and cannot establish cause and effect. Open questions include oral bioavailability, tissue distribution, metabolic stability, and long-term effects. Review articles generally call for more rigorous pharmacokinetic and safety research before any clinical use could be considered.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic small molecule | Studied as a REV-ERB agonist |
| Molecular formula | C20H24ClN3O4S | Reported for the neutral compound |
| Appearance | Off-white to pale yellow solid | Typical research-grade material |
| Solubility | Sparingly soluble in water | Soluble in solvents such as DMSO |
| Common synonyms | SR9009; Stenabolic | Stenabolic is an informal alias |
Preclinical reports have linked SR9009 to improved endurance and altered energy expenditure in rodents. Such findings have prompted interest in whether REV-ERB activation can influence skeletal muscle metabolism. However, the reported effects depend on dose, route, and experimental model, and replication across laboratories is limited. Human trials have not established comparable outcomes, so claims about exercise performance remain speculative. The absence of controlled human data is a central limitation in interpreting these observations.
The mechanism of action involves binding to REV-ERB receptors and recruiting corepressor complexes, which represses target gene transcription. This contrasts with many nuclear receptor agonists that activate transcription. Downstream effects may include changes in autophagy, mitochondrial biogenesis, and lipid handling, but the precise pathways remain an active area of study. Whether these molecular events translate into meaningful physiological effects in humans is unresolved. Most evidence comes from cultured cells and rodent models rather than human participants.
SR9009 is a synthetic small molecule developed as an agonist of the nuclear receptors REV-ERBα (NR1D1) and REV-ERBβ (NR1D2). These receptors help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, SR9009 alters transcription of genes involved in lipid metabolism, inflammation, and mitochondrial function. It is not an approved medicine, and its pharmacological profile in humans remains largely uncharacterized. The compound is frequently discussed in the context of circadian biology and metabolic research rather than clinical use.
Regulatory treatment of SR9009 varies by country and context. It is not approved as a therapeutic drug by agencies such as the United States Food and Drug Administration or the European Medicines Agency. Sports authorities list it as a prohibited substance; the World Anti-Doping Agency classifies it among hormone and metabolic modulators. Legal status for personal possession or sale differs across jurisdictions, and some countries may restrict it under analog or research chemical laws. Buyers who seek verified material often rely on independent laboratory testing because online product labels may not match contents.
Laboratory samples of SR9009 are typically handled as research chemicals rather than pharmaceuticals. Suppliers usually state that the material is for research use only and not for human or veterinary administration. Storage recommendations generally call for a freezer at approximately −20 °C, protection from light, and a desiccated environment. The solid is often described as a white to off-white powder. Solubility is commonly reported in organic solvents such as dimethyl sulfoxide and ethanol, with low solubility in water.
Analytical identification and purity assessment often use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Liquid chromatography–tandem mass spectrometry is used to detect and quantify SR9009 in biological matrices, including urine and blood, for anti-doping or pharmacokinetic studies. Nuclear magnetic resonance spectroscopy can confirm molecular structure. Stability depends on form and storage: the solid is generally more stable than solutions, and repeated freeze–thaw cycles may degrade samples. Purity is typically reported as a percentage from a certificate of analysis.
==== On Unnatural Amino Acids ==== Pd-mediated Sonogashira, Heck, and Suzuki-Miyaura cross-coupling reactions have been applied widely to modify peptides and proteins, where diverse Pd reagents have been developed for the application in aqueous solutions. Those reactions require the protein or peptide substrate bearing unnatural functional groups such as alkyne, aryl halides, and aryl boronic acids, which can be achieved through genetic code expansion or post-translational modifications.
is a surface integral. (Note that the concept that is here called "flux" is alternatively termed flux density in some literature, in which context "flux" denotes the surface integral of flux density. See the main article on Flux for details.)
=== History === The team first competed in the Victorian Junior Football League (later the AFL reserves) when the competition was established in 1919, and was known as Essendon Juniors until the end of 1922. The team enjoyed success in the form of eight premierships, including in the last year of the reserves competition in 1999. From 2000 until 2002, the club's reserves team competed in the Victorian Football League. At the end of 2002, the club dissolved its reserves team and established a reserves affiliation with the Bendigo Football Club in the VFL. The affiliation ran for ten years from 2003 until 2012, allowing reserves players from the Essendon list to play with Bendigo. For all but the final year of the affiliation, Bendigo was known as the Bendigo Bombers. The club re-established its reserves team in 2013, seeking greater developmental autonomy. The team plays its home games at Windy Hill. The team is made up of senior-listed AFL players and VFL-contracted players.
Sources: en.wikipedia.org
==== Added sodium ==== One of the main sources for sodium in the diet is processed foods. Sodium, mostly in the form of sodium chloride, i.e. salt, is added to prevent spoilage, add flavor and enhance the texture of these foods. Americans consume an average of 3436 milligrams of sodium per day, which is higher than the recommended limit of 2300 milligrams per day for healthy people, and more than twice the limit of 1500 milligrams per day for those at increased risk for heart disease.
In total, four enzymes are required for the process: three of which are encoded in the dszABC genes (the flavin-dependent monoxygenases DszA and DszC, and the desulfinase DszB) and fourth chromosome encoded enzyme, DszD, which is responsible for the regeneration and supply of the flavin mononucleotide cofactor required for DszA and DszC. It has also been observed that some anaerobic bacteria can use an alternative sulfur-specific pathway to produce hydrogen sulfide instead. However, to date, the desulfurization of fractions such as bitumen, vacuum gas oil, or deasphalted oil has not been observed
Because of this fact, it has become common practice to establish the quality of NMR ensembles, by comparing it against the unique conformation determined by X-ray diffraction, for the same protein. However, the X-ray diffraction structure may not exist, and, since the proteins in solution are flexible molecules, a protein represented by a single structure may lead to underestimate the intrinsic variation of the atomic positions of a protein. A set of conformations, determined by NMR or X-ray crystallography may be a better representation of the experimental data of a protein than a unique conformation. The utility of a model will be given, at least in part, by the degree of accuracy and precision of the model. An accurate model with relatively poor precision could be useful to study the evolutionary relationships between the structures of a set of proteins, whereas the rational drug design requires both precise and accurate models. A model that is not accurate, regardless of the degree of precision with which it was obtained will not be very useful. Since protein structures are experimental models that can contain errors, it is very important to be able to detect these errors. The process aimed at the detection of errors is known as validation. There are several methods to validate structures, some are statistical like PROCHECK and WHAT IF while others are based on physical principles as CheShift, or a mixture of statistical and physics principles PSVS.
Diabetes Care. 16 (11): 1470–8. doi:10.2337/diacare.16.11.1470. PMID 8299436. S2CID 23783836. Haakens K., Hanssen K.F.; et al. (1990). "CSII, MDI and conventional insulin therapy in self-selecting insulin-dependent diabetic patients. A comparison of metabolic control acute complications and patient preferences". J Intern Med. 228 (5): 457–464. doi:10.1111/j.1365-2796.1990.tb00263.x. PMID 2254715. S2CID 20197231. Ludvigsson J; et al. (2003). "Continuous Subcutaneous Glucose Monitoring Improved Metabolic Control in Pediatric Patients With Type 1 Diabetes: A Controlled Crossover Study". Pediatrics. 111 (5): 933–8. doi:10.1542/peds.111.5.933. PMID 12728068. S2CID 30709714. Marcus A.O., Fernandez M.P. (1996). "Insulin pump therapy; acceptable alternative to injecting therapy". Postgraduate Medicine. 99: 3. Mudaliar S., Edelman S.V. (2001). "Insulin therapy in type 2 diabetes". Endocrinology and Metabolism Clinics. 39 (4): 935–82. doi:10.1016/s0889-8529(05)70222-x. PMID 11727406. Pitzer KR; et al. (2001). "Detection of Hypoglycemia With the GlucoWatch Biographer". Diabetes Care. 24 (5): 881–885. doi:10.2337/diacare.24.5.881. PMID 11347748. Tsui E.Y.L, Chiasson J.L; et al. (1998). "Counterregulatory hormone responses after long-term CSII with lispro insulin". Diabetes Care. 21 (1): 93–6. doi:10.2337/diacare.21.1.93. PMID 9538976. S2CID 21217439.
Sources: en.wikipedia.org
Important musical rhythms of the Andean Region are the danza (dance of Andean folklore arising from the transformation of the European contredance), the bambuco (it is played with guitar, tiple and mandolin, the rhythm is danced by couples), the pasillo (a rhythm inspired by the Austrian waltz and the Colombian "danza", the lyrics have been composed by well-known poets), the guabina (the tiple, the bandola and the requinto are the basic instruments), the sanjuanero (it originated in Tolima and Huila Departments, the rhythm is joyful and fast). Apart from these traditional rhythms, salsa music has spread throughout the country, and the city of Cali is considered by many salsa singers to be 'The New Salsa Capital of the World'. The instruments that distinguish the music of the Eastern Plains are the harp, the cuatro (a type of four-stringed guitar) and maracas. Important rhythms of this region are the joropo (a fast rhythm and there is also tapping as a result of its flamenco ancestry) and the galeron (it is heard a lot while cowboys are working). The music of the Amazon region is strongly influenced by the indigenous religious practices. Some of the musical instruments used are the manguaré (a musical instrument of ceremonial type, consisting of a pair of large cylindrical drums), the quena (melodic instrument), the rondador, the congas, bells, and different types of flutes. The music of the Archipelago of San Andrés, Providencia and Santa Catalina is usually accompanied by a mandolin, a tub-bass, a jawbone, a guitar and maracas.
27 March – A report clears Conservative MP Bernard Jenkin of breaching COVID-19 laws over his attendance at a "wine and nibbles" event on the Parliamentary estate in December 2020, which the report describes as socially-distanced with "business and social elements". 28 March – Keir Starmer and Angela Rayner launch Labour's campaign for the 2024 United Kingdom local elections at an event in Dudley. Honours are conferred on businessman and senior Conservative Party treasurer Mohamed Mansour, Farming Minister Mark Spencer and Shipley MP Philip Davies, all of who receive knighthoods, while former ministers Tracey Crouch and Harriett Baldwin are awarded damehoods. The announcement comes as part of an honours list published at the start of the Parliamentary recess. The Assisted Dying for Terminally Ill Adults (Scotland) Bill, a bill to legalise assisted dying in Scotland and drafted by Liberal Democrat MSP Liam McArthur, is introduced into the Scottish Parliament. 29 March – Sir Jeffrey Donaldson resigns as leader of the Democratic Unionist Party after being charged with rape and other historical sexual offences. Gavin Robinson is appointed interim leader until a new leader can be elected. 30 March – First Minister of Northern Ireland Michelle O'Neill says she is determined the Stormont Assembly and Executive will continue to function following the resignation of Jeffrey Donaldson as DUP leader. 31 March – The UK government says it will work alongside the Northern Ireland Executive to maintain stability at Stormont.
The skeleton, where plutonium accumulates, and the liver, where it collects and becomes concentrated, are at risk. Plutonium is not absorbed into the body efficiently when ingested; only 0.04% of plutonium oxide is absorbed after ingestion. Plutonium absorbed by the body is excreted very slowly, with a biological half-life of 200 years. Plutonium passes only slowly through cell membranes and intestinal boundaries, so absorption by ingestion and incorporation into bone structure proceeds very slowly. Donald Mastick accidentally swallowed a small amount of plutonium(III) chloride, which was detectable for the next thirty years of his life, but appeared to suffer no ill effects. Plutonium is more dangerous if inhaled than if ingested. The risk of lung cancer increases once the total radiation dose equivalent of inhaled plutonium exceeds 400 mSv. The U.S. Department of Energy estimates that the lifetime cancer risk from inhaling 5,000 plutonium particles, each about 3 μm wide, is 1% over the background U.S. average. Ingestion or inhalation of large amounts may cause acute radiation poisoning and possibly death. However, no human being is known to have died because of inhaling or ingesting plutonium, and many people have measurable amounts of plutonium in their bodies. The "hot particle" theory in which a particle of plutonium dust irradiates a localized spot of lung tissue is not supported by mainstream research—such particles are more mobile than originally thought and toxicity is not measurably increased due to particulate form.
As for ALA-T inhibition, though the consequences of disabling this enzyme are currently not well understood, there is some evidence to suggest that it is this action of the hydrazines (including phenelzine) which may be responsible for the occasional incidence of hepatitis and liver failure. Phenelzine has also been shown to metabolize to phenethylamine (PEA). PEA acts as a releasing agent of norepinephrine and dopamine, which occurs in a similar manner to amphetamine by being taken up into vesicles, displacing and causing the release of those monoamines, and reversing monoamine flux through their respective transporters (though with markedly shorter pharmacokinetics). Phenelzine usually requires several weeks of treatment to achieve full therapeutic effects. Modern guidance notes that while some improvement may occur within days or weeks, the full antidepressant effect of a given dose may take 4 to 6 weeks, and with phenelzine may take 8 to 12 weeks. A therapeutic response to MAOIs has historically been associated with inhibition of at least 80–85% of monoamine oxidase activity.
== Nucleotide matrices == With nucleotides only having four possible values (in most bioinformatic sequences), the emphasis lies not in setting fixed values in the matrix, but in designing parameterized models that fit the observed evolution of the input sequence as it's being aligned. See Models of DNA evolution.
Sources: en.wikipedia.org
SR9009 is a synthetic research compound that activates the REV-ERBα and REV-ERBβ nuclear receptors. It is not an approved drug and has no established human therapeutic use. Most published biological data come from cell and rodent studies.
No. SR9009 is frequently mislabeled as a SARM in online discussions, but it does not target androgen receptors. Its known mechanism involves REV-ERB nuclear receptors and circadian-metabolic gene regulation.
Human clinical data are very limited. There is no approved human use, and safety and efficacy in people are not established. Most evidence comes from preclinical models, so effects observed in animals may not apply to humans.
No. It is an investigational compound without approved therapeutic indications. It is sold for research purposes only in many jurisdictions.