Everything below concerns circadian rhythm. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-01-23. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
| 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 |
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ, also called NR1D1 and NR1D2. These receptors help regulate circadian rhythms and metabolic gene programs. The compound was developed for laboratory research, not as an approved therapeutic. Its identity is distinct from steroid hormones and selective androgen receptor modulators. Scientific interest centers on how REV-ERB activation changes gene expression in cells and animal models.
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.
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.
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.
=== NPH insulin === NPH insulin, also known as isophane insulin, is an intermediate-acting insulin used to manage blood sugar levels in individuals with diabetes. The name NPH is an abbreviation for "neutral protamine Hagedorn", referring to neutral pH (pH = 7), protamine a protein attached to the insulin molecule, and Hans Christian Hagedorn, the insulin researcher who developed this formulation. It was designed to enhance insulin delivery and is one of the early examples of engineered drug delivery. It is typically administered through subcutaneous injection once or twice daily. Its effects usually begin within an hour and last for 24 hours. There are versions available that are premixed with short-acting insulins, such as regular insulin. The most common side effect is low blood sugar (hypoglycemia). Other potential side effects may include pain or skin changes at the injection sites, low blood potassium, and allergic reactions. It is generally considered safe for use during pregnancy for the fetus. NPH insulin is produced by mixing regular insulin and protamine in precise proportions with zinc and phenol to maintain a neutral pH and form crystals. There are versions based on human and pig insulin. Protamine insulin was first created in 1936, and NPH insulin was introduced in 1946. It is included in the World Health Organization's List of Essential Medicines In 2020, insulin isophane was the 221st most commonly prescribed medication in the United States, with more than 2 million prescriptions.
Soy sauce (sometimes called soya sauce in British English) is a liquid condiment of Chinese origin, traditionally made from a fermented paste of soybeans, roasted grain, brine, and Aspergillus oryzae or Aspergillus sojae molds (kōji). It is recognized for its saltiness and pronounced umami taste. Soy sauce was created in its current form about 2,200 years ago during the Western Han dynasty of ancient China. Since then, it has become an important ingredient in East and Southeast Asian cooking as well as a condiment worldwide.
Local border traffic is the flow of travellers residing within the area surrounding a controlled international or internal border. In many cases, local border traffic is subject to special regulations to expedite it. Depending on the particular border in question, these measures may be restricted to residents, implemented as a blanket regional visa waiver by one jurisdiction for nationals of the other, restricted to frequent cross-border travellers, or available to individuals lawfully present in one jurisdiction seeking to visit the other. Schengen Area: Schengen states which share an external land border with a non-Schengen state are authorised by EU Regulation 1931/2006 to conclude bilateral agreements with neighbouring countries implementing a simplified local border traffic regime. Such agreements define a border area and provide for the issuance of local border traffic permits to residents of the border area that may be used to cross the EU external border within the border area.
We Happy Few received "mixed or average" reviews, according to review aggregator website Metacritic. The audio was received positively, with the voice-acting being singled out for praise. Brittany Vincent of Shacknews elaborated that the characters' "stereotypical" accents along with the "peppy" music lent the game a "realistic lilt that make these weirdos even creepier". The performances for the three main characters were commended; Tyler Wilde of PC Gamer deemed the leads to be the game's great strength, describing them as "blending comedy and tragedy with calculated balance", and added that they spoke to themselves so naturally that Wilde nearly overlooked that they were "doing the videogame thing of saying everything out loud for no reason". Michael Huber of Easy Allies additionally cited the disconcerting effect of Uncle Jack's broadcasts. However, while Sam Spyrison of Hardcore Gamer agreed that the voice-acting was mostly solid, he felt that the dialogue was inconsistent, saying that it "ranges from original and enticing to disjointed and nonsensical". The music was appreciated, with Brian Shae of Game Informer and Caty McCarthy of USgamer singling out the use of distorted 1960s-style rock and roll music as a contribution to the game's haunting atmosphere. James Stephanie Sterling called the game "a joyless broken disaster" and suggested that it should be recalled. Sterling, having performed some minor voice-over work for the game during its crowdfunding phase, stated their embarrassment "for having the loosest of loose associations" with the final game.
Sources: en.wikipedia.org
Valve closed the office in August 2013 when it decided it had little benefit. At the 2013 D.I.C.E. Summit, Newell announced that he and the film director J. J. Abrams were collaborating to produce a Half-Life or Portal film, as well as a possible game. In the 2010s, Valve released fewer games and invested in hardware development. Newell intended to make Valve more like Nintendo, which develops games in tandem with hardware, allowing it to create innovative games such as Super Mario 64. Valve initially focused on augmented reality, but in 2013 Newell laid off many staff to focus on virtual reality (VR). Valve began porting its games to Linux in 2013, including Half-Life 2 and Left 4 Dead 2. In 2015, Valve released the Steam Machine, a line of gaming computers, which sold poorly. Media commentators speculated that Valve's transition to service provider with Steam, which generated an estimated $3.4 billion in 2017, had driven it away from game development. Valve canceled games including numerous Half-Life projects (including Episode Three), Left 4 Dead 3, a Soulslike game, and a voxel-based game, A.R.T.I. Additional VR projects included SimTrek, developed by members of the Kerbal Space Program development team, and a new VR device, Vader, that was determined to be too costly for consumers. According to the designer Robin Walker, the abundance of projects that failed to gain traction, with no shared vision, damaged morale. Many players grew frustrated in anticipation of a new Half-Life game.
=== Lysostaphin === The lysostaphin test is used to differentiate between Staphylococcus and Micrococcus bacteria. Lysostaphin can lyse Staphylococcus, but Micrococcus bacteria are resistant to the chemical.
== Applications == Surfactants are widely used due to their ability to modify surface and interfacial properties, making them relevant in processes involving the interaction of hydrophobic and hydrophilic substances. Their amphiphilic nature—containing both hydrophilic and hydrophobic parts—enables them to bridge these otherwise immiscible components, thereby facilitating mixing and enhancing the efficiency of various physical and chemical transformations. This makes surfactants useful in numerous fields where control over interfacial interactions is relevant. Surfactants play an important role as cleaning, wetting, dispersing, emulsifying, foaming and anti-foaming agents in many practical applications and products, including detergents, fabric softeners, motor oils, emulsions, soaps, paints, adhesives, inks, anti-fogs, ski waxes, snowboard wax, in flotation, washing and enzymatic processes, and laxatives.
Sources: en.wikipedia.org
=== Recreational use === Although some studies have reported flupirtine has no addictive properties, there was suggestion that it may possess some miuse potential and liability. There were at least two registered cases of flupirtine misuse. Drug tolerance does not develop in most cases, but has individually occurred. Flupirtine was reported as a novel designer drug in 2025. The effects of flupirtine have been said to be very difficult to describe. They have been reported to include "strong helicopter-like effects at high doses" causing users to have to "walk leaning against a wall", dissociative effects, feelings of euphoria throughout the body, and a very light buzzing sensation. Some have compared it to mephedrone, while others have described the physical bodily sensations as similar to those of MDMA and other entactogens. The drug is said to be able to produce psychosis and mania as adverse effects and to do so more readily than cathinone stimulants. The euphoria produced by flupirtine is said to last 40 to 60 minutes, whereas other effects last all day. The effects are said to convert after 2 hours from stimulant or euphoriant effects into a kind of nootropic effect that affects thinking. The drug is frequently used to enhance the effects of other recreational drugs.
Russia launched 16 missiles and 13 drones at energy infrastructure across Ukraine. Two energy workers in Zaporizhzhia Oblast were wounded. In Lviv Oblast a missile hit an energy facility, starting a fire. In Ivano-Frankivsk one of the buildings of Ivano-Frankivsk National Technical University of Oil and Gas was semi-destroyed and a kindergarten was damaged. Explosions were reported in Volyn and Vinnytsia Oblasts. Twelve missiles and all drones were shot down, according to the Ukrainian Air Force. Russian media reported that a Pantsir S-1 anti-aircraft missile system was struck in a Ukrainian air attack in Belgorod Oblast. Three people were killed in Russian airstrikes in Kharkiv.
Per CLIA, each specific laboratory system, assay, examination is graded for level of complexity by assigning scores of 1, 2, or 3 for each of the following seven criteria. A score of 1 is the lowest level of complexity, and a score of 3 is the highest. Score 2 is assigned when the characteristics for a particular test are intermediate between the descriptions listed for scores of 1 and 3. Criteria for categorization:
has stated that these are the only actions known at present which could explain or at least contribute to the antidepressant effects of trimipramine. That said, blockade of the 5-HT2A, 5-HT2C, and α2-adrenergic receptors, as with mirtazapine, has also been implicated in antidepressant effects. In any case, there is also clinical and animal evidence that trimipramine does not inhibit the reuptake of monoamines. Unlike other TCAs, it does not downregulate β3-adrenergic receptors, which is likely the reason that it does not cause orthostatic hypotension. It can be safely combined with MAOIs apparently without risk of serotonin syndrome or hypertensive crisis. Indeed, in rabbits, whereas hyperpyrexia (a symptom of serotonin syndrome) occurs with imipramine and an MAOI and to a lesser extent with amitriptyline and an MAOI, it does not occur at all with trimipramine and an MAOI, likely due to trimipramine's lack of serotonin reuptake inhibition.
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.
It is a synthetic REV-ERB agonist used mainly in preclinical research. It is not an approved medicine for human use.