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Sr9009 Identity And Mechanism — Hands-On Walkthrough

By Editorial Desk · published 2026-07-13 · last reviewed 2026-08-01 · Blog

certificate of analysis is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.

Last reviewed on 2026-08-01. Where a claim depends on a specific study, the study is described rather than over-claimed.

SR9009 Identity and Mechanism

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.

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.

Analytical Detection and Regulatory Status

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.

Sr9009 at a glance

PropertyValueNotes
Common nameSR9009Also marketed informally as Stenabolic
Chemical classSynthetic REV-ERB agonistBinds REV-ERBα and REV-ERBβ
Molecular formulaC24H30ClN3O4SApproximate molecular weight 492 g/mol
CAS Registry Number1379686-30-2Identifier for the parent compound
Regulatory statusNot approved for human useProhibited in sport by WADA

SR9009 Background and Mechanism

Pharmacokinetic data for SR9009 are limited in published literature. Some reports indicate low oral bioavailability and rapid clearance in animals, which complicates interpretation of exposure and effect. Researchers often use injected routes in preclinical work to achieve measurable systemic levels. Analytical studies rely on mass spectrometry to detect the parent compound and its metabolites. Questions about tissue distribution, active metabolites, and long-term consequences remain open. Species differences in metabolism can affect observed half-life and target engagement.

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 and metabolic gene expression. In laboratory experiments, SR9009 binds these receptors and alters transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. It is not a naturally occurring compound and has no approved therapeutic use. Research interest stems from its ability to modify energy metabolism in cells and animal models.

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Analytical Detection and Stability

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.

Supporting material

=== Container closure === Formulated drugs are stored in container closure systems for extended periods of time. These include blisters, bottles, vials, ampules, syringes, and cartridges. The containers can be made from a variety of materials including glass, plastic, and metal. The drug may be stored as a solid, liquid, or gas. It's important to check whether there are any undesired interactions between the preparation and the container. For instance, if a plastic container is used, tests are carried out to see whether any of the ingredients become adsorbed on to the plastic, and whether any plasticizer, lubricants, pigments, or stabilizers leach out of the plastic into the preparation. Even the adhesives for the container label need to be tested, to ensure they do not leach through the plastic container into the preparation.

Robinson, running unopposed, became the Republican nominee for Oregon's 4th congressional district, to again face incumbent DeFazio, who had defeated Robinson's son Matthew in a landslide in the Democratic primary. In the general election, DeFazio defeated Robinson by 212,866 votes (59.1%) to 140,549 (39%).

Electrospray ionization (ESI) is the most common ionization technique applied in LC/MS/MS especially with triple quadrupole mass spectrometers where multiple reaction monitoring (MRM) or untargeted MRM can be performed. This soft ionization is most successful for polar molecules with ionizable functional groups. Another commonly used soft ionization technique is secondary electrospray ionization (SESI). In the 2000s, surface-based mass analysis has seen a resurgence, with new MS technologies focused on increasing sensitivity, minimizing background, and reducing sample preparation. The ability to analyze metabolites directly from biofluids and tissues continues to challenge current MS technology, largely because of the limits imposed by the complexity of these samples, which contain thousands to tens of thousands of metabolites. Among the technologies being developed to address this challenge is Nanostructure-Initiator MS (NIMS), a desorption/ ionization approach that does not require the application of matrix and thereby facilitates small-molecule (i.e., metabolite) identification. MALDI is also used; however, the application of a MALDI matrix can add significant background at < 1000 Da that complicates analysis of the low-mass range (i.e., metabolites). In addition, the size of the resulting matrix crystals limits the spatial resolution that can be achieved in tissue imaging. Because of these limitations, several other matrix-free desorption/ionization approaches have been applied to the analysis of biofluids and tissues.

== Research contributions == Brenner has made multiple contributions to molecular biology and biochemistry, beginning with purification and characterization of the Kex2 proprotein convertase at Stanford. Significant research projects include the role of Ap3A binding in the function of the FHIT tumor suppressor gene, characterization and inhibition of DNA methylation, and discovery of new steps in nicotinamide adenine dinucleotide (NAD) metabolism. Notably, the Brenner laboratory discovered that eukaryotes use nicotinamide riboside (NR) to make NAD+. Bieganowski and Brenner (2004) found that NR is converted to NAD+ through the action of nicotinamide ribose kinases including Nrk1 (yeast and human) and Nrk2 (human). Belenky et al. (Cell, 2007) reported another pathway which turns NR into NAM through the action of nucleosidases Urh1/Pnp1/Meu1 and is Nrk1 independent.

Sources: en.wikipedia.org

Supporting material

High-resolution Nuclear Magnetic Resonance. McGraw-Hill Book Company. John D. Roberts (1959). Nuclear Magnetic Resonance: applications to organic chemistry. McGraw-Hill Book Company. ISBN 978-1-258-81166-2. {{cite book}}: ISBN / Date incompatibility (help) Charles P. Slichter (1963). Principles of magnetic resonance: with examples from solid state physics. Harper & Row. ISBN 978-3-540-08476-1. {{cite book}}: ISBN / Date incompatibility (help) J.M. Tyszka; S.E. Fraser; R.E. Jacobs (2005). "Magnetic resonance microscopy: recent advances and applications". Current Opinion in Biotechnology. 16 (1): 93–99. doi:10.1016/j.copbio.2004.11.004. PMID 15722021. Kurt Wüthrich (1986). NMR of Proteins and Nucleic Acids. New York (NY), US: Wiley-Interscience. ISBN 978-0-471-11917-3.

== Advantages of inlet ionization == Ionization at atmospheric pressure often leads to a loss of ions during the transfer of the ions from the ambient pressure region to the vacuum of the mass analyzer. Ions are lost due to dispersion of analyte spray and 'rim loss' causing fewer ions to reach the vacuum for m/z separation to occur. Initial ionization occurs in the sub-atmospheric pressure region of the heated inlet tube which is directly attached to the vacuum of the mass analyzer and so ion loss is reduced as transfer of the ions does not occur. In LSII the use of the laser increases the image quality of the results by producing better spatial resolution. This is where more pixels are created and so a clearer image is obtained. Multiply charged ions are produced further extending mass range. Multiple methods can be used to fragment molecules producing fragmentation for structural information: electron transfer dissociation (ETD), collision-induced dissociation (CID), and electron capture dissociation (ECD). When using a laser, only small volumes are needed.

Neo (born as Thomas A. Anderson, also known as The One) is a fictional character and the protagonist of The Matrix franchise, created by the Wachowskis. He was portrayed as a cybercriminal and computer programmer by Keanu Reeves in the films, as well as having a cameo in The Animatrix short film Kid's Story. Andrew Bowen provided Neo's voice in The Matrix: Path of Neo. In 2021, Reeves reprised his role in The Matrix Resurrections with what Vulture calls "his signature John Wick look". In 2008, Neo was selected by Empire as the 68th Greatest Movie Character of All Time. "Neo" is also an anagram of "one", a reference to his destiny of being The One who would bring peace. There are claims that a nightclub in Chicago inspired the name of the character. Neo is considered to be a superhero.

Arginine is the amino acid with the formula (H2N)(HN)CN(H)(CH2)3CH(NH2)CO2H. The molecule features a guanidino group appended to a standard amino acid framework. At physiological pH, the carboxylic acid is deprotonated (−CO2−) and both the amino and guanidino groups are protonated, resulting in a cation. Only the L-arginine (symbol Arg or R) enantiomer is found naturally. Arg residues are common components of proteins. It is encoded by the codons CGU, CGC, CGA, CGG, AGA, and AGG. The guanidine group in arginine is the precursor for the biosynthesis of nitric oxide. Like all amino acids, it is a white, water-soluble solid. The one-letter symbol R was assigned to arginine for its phonetic similarity in English.

=== Initial effects on health assistance === On February 6, 2025, reports indicated that the total number of employees to be retained was 294, out of a total of more than 10,000. Trump declared that agency leaders were "radical left lunatics", while the State Department ordered them to halt virtually all their projects, even if that meant ceasing programs that helped to eradicate smallpox and prevented millions of HIV cases. The freeze in HIV relief programs, including PEPFAR, is estimated to jeopardize treatment access for 20 million people, including 500,000 children. This drastic action led to sudden pauses in over 30 clinical trials for ailments such as HIV, malaria, cholera, cervical cancer, and tuberculosis, leaving participants with medical devices in their bodies and cut off from researchers, likely going against the principles of the Declaration of Helsinki.

Sources: en.wikipedia.org

Supporting material

== Diversity == There are a large number of PBPs, usually several in each organism, and they are found as both membrane-bound and cytoplasmic proteins. For example, Spratt (1977) reports that six different PBPs are routinely detected in all strains of E. coli ranging in molecular weight from 40,000 to 91,000. The different PBPs occur in different numbers per cell and have varied affinities for penicillin. The PBPs are usually broadly classified into high-molecular-weight (HMW) and low-molecular-weight (LMW) categories. High Molecular Mass (HMM) PBP’s are essential for cell viability and they are divided between two classes. Class A enzymes catalyze both the polymerization of a peptidoglycan from disaccharide peptides (glycosyltransferase) and the cross-linking of muramyl peptides (transpeptidase). On the other hand, class B enzymes possess transpeptidase activity (only cross linking). Low Molecular-Mass (LMM) PBP’s are dispensable for normal cell growth and control how tightly the peptidoglycan chains are linked together. Proteins that have evolved from PBPs occur in many higher organisms and include the mammalian LACTB protein.

== Further reading == B.L. Karger, 2014, "Separation and Purification: Single-stage versus multistage processes" and "Separation and Purification: Separations Based on Equilibrium", Encyclopædia Britannica, see [1] and [2], accessed 12 May 2014. Gunt Hamburg, 2014, "Thermal Process Engineering: liquid–liquid extraction and solid-liquid extraction", see [3], accessed 12 May 2014. G.W. Stevens, T.C., Lo, & M. H. I. Baird, 2007, "Extraction, liquid–liquid", in Kirk-Othmer Encyclopedia of Chemical Technology, doi:10.1002/0471238961.120917211215.a01.pub2, accessed 12 May 2014. Colin Poole & Michael Cooke, 2000, "Extraction", in Encyclopedia of Separation Science, 10 Vols., ISBN 978-0-12-226770-3, see [4], accessed 12 May 2014. Sikdar, Cole, et al. Aqueous Two-Phase Extractions in Bioseparations: An Assessment. Biotechnology 9:254. 1991 Szlag, Giuliano. A Low-Cost Aqueous Two Phase System for Enzyme Extraction. Biotechnology Techniques 2:4:277. 1988 Dreyer, Kragl. Ionic Liquids for Aqueous Two-Phase Extraction and Stabilization of Enzymes. Biotechnology and Bioengineering. 99:6:1416. 2008 Boland. Aqueous Two-Phase Systems: Methods and Protocols. Pg 259-269 https://web.archive.org/web/20100702074135/http://ull.chemistry.uakron.edu/chemsep/extraction/ Topological Analysis of the Gibbs Energy Function (Liquid-Liquid Equilibrium Correlation Data). Including a Thermodynamic Review and a Graphical User Interface (GUI) for Surfaces/Tie-lines/Hessian matrix analysis - University of Alicante (Reyes-Labarta et al. 2015-18)

Warden III, who largely planned the USAF attacks; within ten minutes of the attacks by 21 F117 aircraft on 38 targets, Iraq had lost its communications and radar; Lt-Col David Deptula; in the first wave were 4 Saudi Arabian Tornado aircraft, 4 Grumman A-6 Intruder and SEAD McDonnell Douglas F-4G Wild Weasel V aircraft, 5 Northrop Grumman EA-6B Prowler aircraft to provide electronic jamming of the Iraq airspace, and 21 McDonnell Douglas F/A-18 Hornet aircraft, each which dropped the AGM-88 HARM anti-radiation missile, to destroy the Iraq surface to air missile capability; Tomahawk missiles were fired from battleships in the Gulf and submarines in the Red Sea; the General Dynamics F-111 had around four thousand gallons of fuel; before advanced guidance systems for munitions, munitions would land according to the circular error probability, which was around a half-mile for a B-17 in World War II; the first laser-guided munitions were the Pave Tack system, which debuted on the F-111 in 1982, first deployed by F-111 aircraft from RAF Lakenheath; Duncan Lennox, editor of Jane's Strategic Weapon Systems; Theodore Postol; on one evening, twenty-eight MIM-104 Patriot missiles were launched against five ballistic missiles, which had broken up on re-entry to the earth's atmosphere - hitting any of these fractured ballistic missiles was almost impossible, due to the unforeseen changing aerodynamics; Lt-Col George Cusimano, deputy director of the USAF joint; the joint also deployed synthetic-aperture radar, to give a fuller view of ground forces, from the AN/APG-76 Doppler radar; the ground picture could be relayed to ground forces, such as in the Battle of Khafji on 29 January 1991; Royal Scots 1st Battalion, with GKN Warrior tracked armoured vehicles and Major John Potter; the experimental Ferranti TIALD laser-guided munitions were deployed by RAF Panavia Tornado aircraft to destroy Iraq hardened aircraft shelters in February 1991; 39th Regiment Royal Artillery deployed the M270 Multiple Launch Rocket System (MLRS); the land battle began on 24 February 1991, watched by the DOAE in Surrey; the land war did not last long, and on 26 February 1991 retreating Iraqi vehicles and tanks were systematically destroyed by AGM-114 Hellfire missiles, launched from undetected Boeing AH-64 Apache helicopters, resulting in total destruction; the USS Wisconsin battleship fired at Failaka Island, with surveillance provided by its AAI RQ-2 Pioneer drone. Narrated by Edward Hardwicke, directed by Chris Haws, produced by Richard Melman, made by InCA Productions 18 August The Healing Mind, about the field of psychoneuroimmunology; psychiatrist Janice Kielcolt-Glaser of Ohio State University College of Medicine; psychologist Barrie R. Cassileth; chemical pathologist Malcolm Carruthers takes a blood sample from a candidate, who has been driven around Brands Hatch at 115 mph; Theodore Melnechuk of the University of California; the body's immune system - the phagocytes destroy foreign bacteria, the natural killer cells destroy the body's own cells that are too damaged, and the lymphocyte T cells and B cells remember pathogens, with a corresponding antibody; experimental psychologist Robert Ader of the University of Rochester Medical Center conducted research on rats in 1975, with cyclophosphamide, which weakens the immune system, and immunologist Nicholas Cohen; prolonged secretion of endogenous opioid peptides may lower the immune function; neuroscientist David L. Felten of the University of Rochester; psychoimmunologist Nick Hall of the University of South Florida College of Medicine and an experiment with drama students, where lowering of T cells was found; Kathleen Dillon of Western New England College, where an experiment measured Ig A of candidates who watched types of television content, and found that Ig A temporarily increased with amusing content; psychiatrist Fawzy Fawzy of the University of California; psychiatrist Margaret Kemeny of UCLA. 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Directed by Bob Bee, produced by Michael Wills (later Labour MP from 1997 to 2010 for North Swindon), and made by Juniper Productions 13 September Theme Park Heaven, Walt Disney; Sylvère Lotringer of Columbia University; Arrow Dynamics of California, with Dal Freeman Ron Toomer; David Lewis; Cedar Point, built by Custom Coasters International of Cincinnati; Eric Westin of Walt Disney Imagineering, and the Big Thunder Mountain Railroad ride; Marc Davis, who drew Tinkerbell in Peter Pan, and who worked on the Pirates of the Caribbean ride, which opened in 1967; Larry Lester and David Codiga of Universal Studios, and their earthquake Studio Tour and Backdraft rides; Dreamland in 1912; psychologist Timothy Leary; Douglas Trumbull and the Back to the Future: The Ride and Luxor Las Vegas; Stan Kinsey of SimEx-Iwerks; Michael Ryder and Thom Dickeson of Evans & Sutherland, and texture mapping onto polygons, a main feature of transportation simulations; Bob Stone of the Advanced Robotics Research Centre at the University of Salford. 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Narrated by Andrew Burt, directed by Julian Nott (son of the Conservative former defence secretary Sir John Nott, who later composed the music for Wallace and Gromit films such as The Wrong Trousers), produced by Jenny Barraclough, made by Peninsula Films 6 October Superpowers?, with Ray Hyman, about the international group of sceptics Committee for Skeptical Inquiry, who dispute topics such as UFOs, made by Open Media 13 October The Lean Burn Machine, about the development of catalytic converters for automotive engines, and how they cause more fuel to be burned than before, and the British engineer Geoffrey West who has produced an alternative, but faced restrictions from EC (EU) legislation; Europe introduced pollution legislation in July 1992; California had the worst vehicle pollution in the US, notably LA; the Clean Air Act; Rob Searles of Johnson Matthey; German environment minister Bernd Schmidbauer - Germany had over two-thirds of European car exports to the US; French physicist Hubert Curien, Minister of Higher Education, Research and Innovation from 1988 to 1993; chemistry graduate Margaret Thatcher being interviewed on 2 March 1989 on the BBC, and lean-burn engines; Bernard Bertrand, head of engine development of Peugeot; Shillington of BL; the new EC legislation in 1992 would outlaw lean-burn powered cars; Dutch automotive writer Gerard Sauer. Narrated by Nick Ross, directed by Nick Abson and Simon Broom, produced by Michael Blakstad (Editor from 1974 of Tomorrow's World), made by Workhouse 20 October The Elements, the poet Roger McGough narrates poetry for each element and how the Periodic Table came to be formed; 5% of the Earth's crust is iron; xenon is found in strobe lights; argon is in domestic incandescent light bulbs; the light bulb filament is tungsten, but reserves of tungsten are low. Directed by Ian Duncan, produced by David Dugan, made by Windfall Films (part of Argonon). 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== Treatment == Once wound dehiscence occurs, it can be treated by allowing granulation, re-cutting and suturing the edges, and providing prophylactic antibiotics. Exposure to the air, debridement, and, if indicated, frequent dressing changes also help.

Sources: en.wikipedia.org

Frequently asked questions

What is SR9009?

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.

Is SR9009 approved for human use?

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.

Why is SR9009 banned in sport?

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.

Is SR9009 approved for human use?

No. It is an investigational compound without approved therapeutic indications. It is sold for research purposes only in many jurisdictions.

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