REV-ERB agonist comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2026-02-14. Where a claim depends on a specific study, the study is described rather than over-claimed.
Physicochemical behavior influences handling. SR9009 is described as a solid with limited aqueous solubility, so organic solvents such as dimethyl sulfoxide or ethanol are common in research stock solutions. Aqueous dilution can produce precipitates if the organic content is too low. Light, heat, and repeated freeze-thaw cycles may affect stability. Storage recommendations usually specify a desiccated freezer environment protected from light, but exact stability data depend on the formulation and matrix.
Detection in biological samples can be complicated by rapid metabolism and low circulating concentrations. Some studies report phase I and phase II metabolites, and analytical methods may need to target those species in addition to the parent compound. Immunoassays are not broadly available, so mass spectrometry remains the main confirmatory approach. For anti-doping testing, laboratories look for SR9009 and its metabolites using validated LC-MS methods. Open questions include how long metabolites remain detectable and how different routes of administration alter detection windows.
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.
| Property | Value | Notes |
|---|---|---|
| Appearance | Off-white to pale yellow solid | Visual description varies with purity and source |
| Solubility | Soluble in DMSO and ethanol; poorly soluble in water | Organic stock solutions are common in research |
| Typical storage | -20 °C, desiccated, protected from light | Avoid repeated freeze-thaw cycles |
| Typical analytical method | LC-MS or HPLC-UV | Reference standards are needed for quantification |
| Molar mass | Approximately 437.9 g/mol | Calculated from the reported free-base formula |
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 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.
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.
From the example above, if the descendant with genes A1 and B underwent another speciation event where gene A1 duplicated, the new species would have genes B, A1a, and A1b. In this example, genes A1a and A1b are symparalogs.
== Removal == This overarching process, which has come to be known simply as virus removal, is one in which all of the viruses in a given sample are removed by traditional extraction or [full energy] methods. Some of the more prominent methods include:
Didanosine (ddI), sold under the brand name Videx among others, is a medication used to treat HIV/AIDS. It is used in combination with other medications as part of highly active antiretroviral therapy (HAART). It is of the reverse-transcriptase inhibitor class. Didanosine was first described in 1975 and approved for use in the United States in 1991.
=== Chemical === Meitnerium is the seventh member of the 6d series of transition metals, and should be much like the platinum group metals. Calculations on its ionization potentials and atomic and ionic radii are similar to that of its lighter homolog iridium; implying that meitnerium's basic properties will resemble those of the other group 9 elements: cobalt, rhodium, and iridium. Prediction of the chemical properties of meitnerium has not received much attention recently. Meitnerium is expected to be a noble metal. The standard electrode potential for the Mt3+/Mt couple is expected to be 0.8 V. Based on the most stable oxidation states of the lighter group 9 elements, the most stable oxidation states of meitnerium are predicted to be +6, +3, and +1, with the +3 state being the most stable in aqueous solutions. Rhodium and iridium show a maximum oxidation state of +6; the most stable states are +4 and +3 for iridium and +3 for rhodium. The oxidation state +9, represented only by iridium in IrO4+, might be possible for meitnerium nonafluoride MtF9 and the MtO4+ cation, though IrO4+ is expected to be more stable than these meitnerium compounds. The meitnerium tetrahalides have also been predicted to have similar stabilities to those of iridium, thus also allowing a stable +4 state. It is further expected that the maximum oxidation states of elements from bohrium (element 107) to darmstadtium (110) may be stable in the gas phase but not in aqueous solution.
In 1931, when he was 16, Thomas left school to become a reporter for the South Wales Daily Post, where he remained for some 18 months. After leaving the newspaper, Thomas continued to work as a freelance journalist for several years, during which time he remained at Cwmdonkin Drive. He continued to add to his notebooks, which would eventually comprise over 200 poems in five books compiled between 1930 and 1935. Of the 90 poems he published, half were written during these years. The discovery in 2014 of the fifth notebook containing 16 poems, compiled between 1934 and August 1935, had substantial implications for the understanding of Thomas's poetic development as well as leading to a revision of the hitherto accepted chronology of composition dates for the poems.
Sources: en.wikipedia.org
German is auxiliary, but a lack of Polish-speaking officials means German is still used in the judiciary until 1920. 25 May 1919: The Army of Great Poland is subjugated to the headquarters of the Polish Army but keeps its separate organisation. 30 May 1919: The People's Guard is transformed to the Home Defence (Obrona Krajowa). 1 June 1919: By-elections of MPs to Sejm Ustawodawczy. 6 June 1919 Skirmishes near Bydgoszcz (Bromberg). The rising threat of a German offensive induces the Commission of the NRL to introduce a state of emergency in all lands under its jurisdiction. In a belt of 20 km from the front line, it introduces martial law. A few days later, the NRL announces capital punishment for acting against the Great Polish Army or for the German army. 18 June 1919: Skirmishes near Rynarzewo. 28 June 1919: The Treaty of Versailles gives almost all of Greater Poland to Poland. 1 July 1919 The Commission of the NRL removes customs border with ex-Kingdom of Poland. Artillery fire at front. 9 July 1919: Farther than 20 km from the front, end of state of emergency. 10 July 1919: Proceedings of the Polish government with Commission of the NRL on further policy in the former Prussian Partition (Były Zabór Pruski). Creation of the Ministry of the Former Prussian Partition (Ministerstwo Byłej Dzielnicy Pruskiej).
2,4-Dinitrochlorobenzene (DNCB) is an organic compound with the chemical formula (O2N)2C6H3Cl. It is a yellow solid that is soluble in organic solvents. It is an intermediate for the industrial production of other compounds.
=== Travel distances === Teams participating in the 2026 World Cup had to travel an average of 5,146 total miles (8,281.7 km) between venues during the tournament. For the 2014 tournament in Brazil, the average distance was 7,054 miles (11,352.2 km), while teams playing in the 2018 tournament in Russia traveled an average of 5,441 miles (8,756.4 km).
Nelson turned Fruton on to biochemistry. He received his degree in chemistry in 1931, and entered graduate school in the Department of Biological Chemistry in the Columbia College of Physicians and Surgeons, working under Hans Thacher Clarke. Fruton's PhD work focused on "the lability of cystine in alkali", although he developed a broad interest in the range of biochemistry-related research being pursued at the College of Physicians and Surgeons. During graduate school Fruton also became active politically, opposing fascism, militarism and anti-Semitism. In 1933 he met Sophia "Topsy" Simmonds, whom he married in 1936. Upon completing his PhD in May 1934, Fruton became a research assistant to Max Bergmann at the Rockefeller Institute for Medical Research.
Sources: en.wikipedia.org
There are many substances that are purported to have promise in augmenting human cognition by various means. These substances are called nootropics and can potentially benefit individuals with cognitive decline and many different disorders, but may also be capable of yielding results in cognitively healthy persons. Generally speaking, nootropics are said to be effective for enhancing focus, learning, memory function, mood, and in some cases, physical brain development. Some examples of these include Citicoline, Huperzine A, Phosphatidylserine, Bacopa monnieri, Acetyl-L-carnitine, Uridine monophosphate, L-theanine, Rhodiola rosea, and Pycnogenol which are all forms of dietary supplement. There are also nootropic drugs such as the common racetams, e.g. piracetam (Nootropil) and omberacetam (Noopept) along with the neuroprotective Semax, and N-Acetyl Semax. There are also nootropics related to naturally occurring substances but that are either modified in a lab or are analogs such as Vinpocetine and Sulbutiamine. Some authors have explored nootropics as relationship enhancements to help couples maintain bonds over time.
==== Career and Technical Education (CTE) Program ==== The Technical Academy is a program that provides students with technical skills and knowledge. Benefits to students include gaining a foundation for a college major in a technical field, having access to a technical career after high school if college is postponed, and having access to a part-time technical job to help with college expenses. Locations:
A 2017 film adaptation of Wonder, starring Julia Roberts, Owen Wilson and Jacob Tremblay, was released in November 2017. A stage adaption premiered in 2025, with actor Garrett McNally, who has Treacher Collins syndrome himself, portraying the character in certain shows. Alison Midstokke, who appears in the drama film Happy Face (2018), is an actress and activist who has the condition.
Sources: en.wikipedia.org
It is usually detected by LC-MS or HPLC-UV against a reference standard. In biological matrices, metabolite targeting can improve detection. No universal immunoassay is widely available.
The compound is generally handled as light-sensitive and stored cold and dry. Stability in solution depends on solvent, concentration, and storage time. Specific degradation rates are not fully standardized.
Limited water solubility affects formulation for cell and animal studies. Organic co-solvents are often used to dissolve it. Precipitation can confound assay results if not controlled.
Legality depends on the country and the intended use. In many places it is sold as a research chemical, but sports and medicine regulations restrict it.