A practical reference on research chemical: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2025-11-03. Anything still debated is marked as such rather than presented as settled.
Most published work on SR9009 consists of preclinical studies. It is widely sold as a research chemical, a category that does not imply safety, efficacy, or pharmaceutical-grade quality. Sports anti-doping organizations have listed SR9009 as a prohibited substance, and its presence in an athlete sample can lead to sanctions. Legal status differs by country; in several jurisdictions it is not approved for human consumption and may be treated as an unapproved new drug.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not a steroid, peptide, or natural hormone. In scientific literature, it appears under the code SR9009 and in non-scientific contexts as Stenabolic. The compound was identified through chemical screening efforts aimed at targeting circadian clock components. Its status remains investigational, and no regulatory agency has approved it as a human medicine.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Common name | SR9009 | Also referred to as Stenabolic in non-scientific contexts. |
| Chemical class | Synthetic small molecule | Not a steroid or peptide hormone. |
| Receptor target | REV-ERBα and REV-ERBβ | Nuclear receptor agonist in preclinical studies. |
| Development status | Investigational | No approved human therapeutic indication. |
| Regulatory attention | Prohibited in sport | Listed by anti-doping authorities. |
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.
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.
Research interest in SR9009 grew from studies showing improved running endurance in mice after short treatment periods. Those experiments linked the compound to increased mitochondrial content and fatty acid oxidation in muscle, but the findings come from animal models and specific dosing schedules. Independent replication has been limited, and the pathways connecting REV-ERB activation to exercise performance are still being mapped. Whether similar responses occur in humans is an open question.
SR9009 is often grouped with compounds studied for circadian and metabolic regulation rather than with classical anabolic steroids. Its interactions with nuclear receptors differ from those of androgen receptor ligands, and its proposed mechanisms involve transcriptional control rather than direct hormone signaling. Some sources classify it as a metabolic modulator because of observed effects on energy utilization. The distinction matters for regulation and for interpreting research results across different compound classes.
SR9009 is a synthetic small molecule developed as a REV-ERB agonist. It binds to REV-ERBα and REV-ERBβ, nuclear receptors that help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, the compound alters lipid and glucose handling and influences skeletal muscle oxidative capacity. Its exact effects in humans remain largely uncharacterized because controlled clinical trials have not been reported. The molecule is frequently described in preclinical literature as a metabolic modulator.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not an approved medicine and has no established human therapeutic use. The compound appears in scientific literature as a tool for probing circadian and metabolic regulation. Online sellers often label it as a research chemical, sometimes using the nickname Stenabolic. Its chemical identity is distinct from selective androgen receptor modulators, stimulants, and peroxisome proliferator-activated receptor delta agonists. Researchers use it mainly in cell and animal experiments.
At the molecular level, SR9009 binds REV-ERBα and REV-ERBβ and alters their repressive activity on target genes. These nuclear receptors help regulate the circadian clock, lipid synthesis, glucose metabolism, and inflammatory pathways. By changing transcription, the compound can shift the timing or magnitude of downstream metabolic processes in model systems. It does not act through androgen receptors or adenosine receptors, which distinguishes it from several substances sold for athletic performance. Whether the same transcriptional changes occur in humans at tolerable exposures remains an open question because controlled human studies are lacking.
== Habitat and distribution == Amanita virosa is found in woodland in late summer and autumn, especially in association with beech and chestnut, but also with pine, spruce, and fir. As with most Amanita species, it forms a mutually beneficial, ectomycorrhizal relationship with the roots of these trees. Amanita virosa was originally described from Sweden and is known throughout Europe, with additional confirmed records from northern Asia (China). The name was formerly used for similar-looking agarics in North America, but research has shown that these American species, including the eastern Amanita bisporigera, the western A. ocreata, and the northern Amanita amerivirosa, are distinct.
Mescaline, also known in chemical terms as 3,4,5-trimethoxyphenethylamine, is a naturally occurring psychedelic drug and alkaloid of the phenethylamine and scaline families found in certain cacti like peyote (Lophophora williamsii) and the San Pedro cactus (Echinopsis pachanoi, others). The drug is used recreationally, spiritually, and medically, with psychedelic effects occurring at doses of 100 to 800 mg (as its hydrochloride salt) orally and it can be used in pure form or in the form of mescaline-containing cacti. Mescaline induces a psychedelic experience characterized by visual changes, altered perception of time, space, and self, synesthesia, and spiritual experiences, with an onset of 30 to 60 minutes, a time to peak of 2 to 4 hours, and a duration that increases with dose and ranges from 6 to 14 hours. Mescaline primarily acts as a partial agonist at serotonin 5-HT2A receptors, with varying affinity and efficacy across multiple other receptors and targets. The serotonin 5-HT2A receptor antagonist ketanserin blocks mescaline's psychoactive effects. Mescaline is a relatively hydrophilic compound structurally related to dopamine, first synthesized in 1919, with numerous synthetic methods and potent analogues developed since. It occurs naturally in various cacti species, with concentrations varying widely, and is biosynthesized in plants from amino acids like phenylalanine and tyrosine. The practice of humans consuming mescaline-containing cacti dates back over 6,000 years.
=== α/β === α/β proteins are a class of structural domains in which the secondary structure is composed of alternating α-helices and β-strands along the backbone. The β-strands are therefore mostly parallel. Common examples include the flavodoxin fold, the TIM barrel and leucine-rich-repeat (LRR) proteins such as ribonuclease inhibitor.
=== Mechanism of action === Levomethadone (the R-(–)-methadone enantiomer) is a μ-opioid receptor agonist with higher intrinsic activity than morphine, but lower affinity. Dextromethadone (the S-(+)-methadone enantiomer) has a much lower affinity to the μ-opioid receptor than levomethadone. Both enantiomers bind to the glutamatergic NMDA (N-methyl-D-aspartate) receptor, acting as noncompetitive antagonists. Methadone has been shown to reduce neuropathic pain in rat models, primarily through NMDA receptor antagonism. NMDA antagonists such as dextromethorphan, ketamine, tiletamine and ibogaine are being studied for their role in decreasing the development of tolerance to opioids and as possible for eliminating addiction/tolerance/withdrawal, possibly by disrupting memory circuitry. Acting as an NMDA antagonist may be one mechanism by which methadone decreases craving for opioids and tolerance, and has been proposed as a possible mechanism for its distinguished efficacy regarding the treatment of neuropathic pain. Methadone also acted as a potent, noncompetitive α3β4 neuronal nicotinic acetylcholine receptor antagonist in rat receptors, expressed in human embryonic kidney cell lines.
Larger living areas on the Skylab space station (1973–1974) allowed for an on-board refrigerator and freezer. This allowed perishable and frozen items to be stored, making microgravity the primary obstacle of future missions. When Skylab's solar panels were damaged during its launch and the station had to rely on minimal power from the Apollo Telescope Mount until Skylab 2 crewmembers performed repairs, the refrigerator and freezer were among the systems that Mission Control kept operational. The Orbital Work Shop (OWS) module had a specially designed wardroom dedicated for food preparation and dining (see image on the right). A dining table was also available, and was designed to avoid hierarchical positions through its triangular layout and to support social cohesion. The table and chairs were fastened to the floor and fitted with foot and thigh restraints, allowing for a more normal eating experience. The trays used could warm the food, and had magnets to hold eating utensils and scissors used for opening food containers. It could accommodate all three crew members at the same time using a variety of microgravity restraints. As a result of the improved eating arrangement, astronauts aboard Skylab maintained some of the best nutritional intake recorded.
Sources: en.wikipedia.org
==== Data annotation and "ghost workers" ==== Beyond hardware, the development of AI models relies on massive amounts of human labour to label data, train algorithms, and moderate content. This work is frequently outsourced to business process outsourcing (BPO) firms operating in the Global South, particularly in countries like Kenya, Ethiopia, and Colombia. These data labourers, often referred to as "ghost workers", operate in what researchers describe as "digital sweatshops". Workers frequently report exploitative conditions, including low pay (sometimes as little as $2 an hour), forced unpaid overtime, and a lack of job security. Furthermore, content moderators are routinely exposed to graphic, violent, and hateful material in order to train AI safety filters. A 2025 Equidem survey of data workers documented widespread psychological harm, including PTSD, anxiety, and depression resulting from this exposure. In the UK, development experts and technology associations have argued that the UK has a responsibility to address these supply chain abuses. The Institute of Development Studies (IDS) has warned that the uncritical use of AI in international development is morally dubious, noting that AI is often built on "stolen data" labelled using the exploited labour of women in low-income countries. The IDS advocates for a "Responsible AI" approach that removes worker exploitation from the supply chain and ensures fair work practices. Furthermore, techUK, the UK's technology trade association, has criticised the UK Government for falling behind on supply chain regulation.
Diagnostic Measurement Tools – Clinical psychologists are able to diagnose psychological disorders and related disorders found in the DSM-5 and ICD-10. Many assessment tests have been developed to complement the clinicians clinical observation and other assessment activities. Some of these include the SCID-IV, the MINI, as well as some specific to certain psychological disorders such as the CAPS-5 for trauma, the ASEBA, and the K-SADS for affective and Schizophrenia in children. Clinical observation – Clinical psychologists are also trained to gather data by observing behavior. The clinical interview is a vital part of the assessment, even when using other formalized tools, which can employ either a structured or unstructured format. Such assessment looks at certain areas, such as general appearance and behavior, mood and affects, perception, comprehension, orientation, insight, memory, and content of the communication. One psychiatric example of a formal interview is the mental status examination, which is often used in psychiatry as a screening tool for treatment or further testing.
== Pharmacology == Gidazepam and several of its analogs, in contrast to other benzodiazepines, are comparatively more selective agonists of TSPO (formerly the peripheral benzodiazepine receptor) than the benzodiazepine receptor. Gidazepam acts as a prodrug to its active metabolite 7-bromo-2,3-dihydro-5-phenyl-1H-1,4-benzodiazepin-2-one (desalkylgidazepam or bromo-nordazepam). Its anxiolytic effects can take several hours to manifest presumably due to its slow metabolism (half-life 87 hours). The onset and intensity of anxiolytic effects correlate with blood levels of desalkylgidazepam.
== Philanthropy == McGregor is involved in charity work, including UNICEF UK since 2004 and GO Campaign. During the Long Way Round journey in 2004, McGregor and his travelling companions saw some of UNICEF's work in Ukraine, Kazakhstan, and Mongolia, and during the Long Way Down trip in 2007, he and Charley Boorman did some work for UNICEF in Africa. McGregor hosted the annual Hollywood gala for the GO Campaign in 2009 and 2010. He has worked with the Children's Hospice Association Scotland, as featured in Long Way Down. In 2012, he travelled with UNICEF immunisation workers to remote parts of India, Nepal and the Republic of Congo for a BBC2 documentary entitled Ewan McGregor: Cold Chain Mission. In June 2015, McGregor read Hans Christian Andersen's "The Little Match Girl" for the children's fairy tales app GivingTales in aid of UNICEF, together with other prominent figures such as Sir Roger Moore, Stephen Fry, Dame Joan Collins, Joanna Lumley, and Sir Michael Caine.
== See also == Gomashio – a type of furikake mostly consisting of cooked black sesame seeds and sea salt crystals Ochazuke – a soup made by sprinkling seasonings (such as furikake) and toppings over cooked rice, then covering with brewed green tea Shichimi – a chilli-based spice mixture similar to furikake mainly used on noodles, soups and gyūdon List of sesame seed dishes Chutney
Sources: en.wikipedia.org
Internal border controls are measures implemented to control the flow of people or goods within a given country. Such measures take a variety of forms, ranging from the imposition of border checkpoints to the issuance of internal travel documents, and vary depending on the circumstances in which they are implemented. Circumstances resulting in internal border controls include increasing security around border areas (e.g., internal checkpoints in America or Bhutan near border regions), preserving the autonomy of autonomous or minority areas (e.g., border controls between Peninsular Malaysia, Sabah, and Sarawak; border controls between Hong Kong, Macau, and mainland China), preventing unrest between ethnic groups (e.g., Northern Ireland's peace walls, border controls in Tibet and Northeastern India), and disputes between rival governments (e.g., between the Republic of China and the People's Republic of China). During the COVID-19 pandemic, temporary internal border controls were introduced in jurisdictions across the globe. For instance, travel between Australian states and territories was prohibited or restricted by state governments at various points of the pandemic, either in conjunction with sporadic lockdowns or as a stand-alone response to COVID-19 outbreaks in neighbouring states. Internal border controls were also introduced at various stages of Malaysia's Movement Control Order, per which interstate travel was restricted depending on the severity of ongoing outbreaks.
phosphorylation The attachment of a phosphate ion, PO3−4, to another molecule or ion or to a protein by covalent bonding. Phosphorylation and the inverse reaction, dephosphorylation, are essential steps in numerous biochemical pathways, including in the production of adenosine triphosphate (ATP) (as in oxidative phosphorylation); in the metabolism of glucose and the synthesis of glycogen; and in the post-translational modification of amino acid residues in many proteins. Enzymes which catalyze phosphorylation reactions are known as kinases; those that catalyze dephosphorylation are known as phosphatases.
=== Astrophysics === MHD applies to astrophysics, including stars, the interplanetary medium (space between the planets), the interstellar medium (space between the stars), and jets. Most astrophysical systems are not in local thermal equilibrium and therefore require an additional kinematic treatment to describe all the phenomena within the system (see Astrophysical plasma). Sunspots are caused by the Sun's magnetic fields, as Joseph Larmor theorized in 1919. The solar wind, predicted by Eugene Parker, is also described by MHD. The differential solar rotation may be the long-term effect of magnetic drag at the Sun's poles, an MHD phenomenon resulting from the Parker spiral shape of the Sun's extended magnetic field. Previously, theories describing the formation of the Sun and planets could not explain how the Sun contains 99.87% of the mass, yet only 0.54% of the angular momentum, in the Solar System. In a closed system, such as the cloud of gas and dust from which the Sun formed, mass and angular momentum are both conserved. That conservation would imply that, as the mass concentrated at the center of the cloud to form the Sun, it would spin faster, much like a skater pulling in their arms. The high rotational speed predicted by early theories would have flung the proto-Sun apart before it could form. However, magnetohydrodynamic effects transfer the Sun's angular momentum to the outer solar system, slowing its rotation. Breakdown of ideal MHD, in the form of magnetic reconnection, is thought to be the likely cause of solar flares.
=== 26 July === Russian forces captured the village of Lozuvatske in Donetsk Oblast, 24 kilometers east of Pokrovsk. The FSB announced the arrest of a suspect in the 24 July car bombing in Moscow who had been extradited from Turkey, claiming that he was a Russian national who carried out the attack on behalf of Ukrainian intelligence. Explosions were reported at Saky airfield in Crimea, and a drone attack on Sevastopol was reported. Russian authorities claimed that 21 drones were shot down over Bryansk Oblast.
Sources: en.wikipedia.org
It is a synthetic compound studied as an agonist of REV-ERB nuclear receptors. It is not an approved medicine and has mainly been examined in laboratory and animal research.
No. It is a small molecule that binds nuclear receptors involved in circadian regulation. Its classification differs from anabolic steroids or peptide hormones.
Published human clinical trial data are lacking. Most safety and activity information comes from preclinical models, so effects in people remain uncertain.
No. It is an investigational compound without approved therapeutic indications. It is sold for research purposes only in many jurisdictions.