LC-MS/MS raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2025-09-25. Anything still debated is marked as such rather than presented as settled.
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.
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.
Identity and purity of SR9009 samples are usually checked with chromatographic and spectrometric methods. High-performance liquid chromatography can separate the compound from related impurities, while mass spectrometry provides molecular mass confirmation. Nuclear magnetic resonance spectroscopy may be used for structural verification in research settings. No single method proves biological activity, and certificates of analysis should be reviewed alongside raw data. Independent testing is often needed because online products vary widely.
SR9009 stability depends on temperature, moisture, light, and solvent. Solid material is generally kept cool and dry, while solutions may require protection from repeated warming and cooling. Degradation can appear as color changes, precipitate, or new chromatographic peaks. Researchers should follow supplier instructions and their own stability data. Long-term storage conditions for human use have not been established because the compound lacks approved clinical formulation.
SR9009 is supplied as a solid research chemical, often in milligram quantities. Laboratories typically weigh it in a controlled environment because fine powders can disperse. Stock solutions are commonly prepared in dimethyl sulfoxide and stored in small aliquots to reduce freeze-thaw cycles. Personal protective equipment and chemical fume hoods are standard when handling unknown or potent compounds. These practices address laboratory safety rather than human use.
| 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 |
For long-term storage, SR9009 is typically kept as a solid at low temperature, protected from moisture and light. Desiccated conditions limit hydrolysis, while opaque containers reduce photochemical breakdown. Solutions are less stable than solids and are often stored frozen in aliquots to avoid repeated freeze-thaw cycles. Stability data are not standardized across all suppliers, so users should rely on certificate-of-analysis information when available. Degradation may appear as color change, precipitate, or decreased chromatographic purity.
Laboratory identification of SR9009 typically relies on chromatographic separation coupled to mass spectrometry, often with ultraviolet detection as a secondary check. Nuclear magnetic resonance spectroscopy can confirm molecular structure when a reference standard is available. Because many suppliers sell the compound as a research chemical, independent identity testing is important for experimental reproducibility. A single retention time is not sufficient proof of identity, especially when related compounds may be present. Purity assessments usually report a percentage based on area normalization.
SR9009 is generally described as poorly soluble in water and more soluble in organic solvents such as dimethyl sulfoxide and ethanol. Stock solutions are commonly prepared in an organic solvent before dilution into an aqueous buffer or vehicle. Precipitation can occur if the organic fraction is reduced too quickly or if the final concentration exceeds the compound's solubility limit. Sonication or gentle warming may aid dissolution in some protocols, but excessive heat can promote degradation. Container material and pH can also influence observed solubility.
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.
In symbolic terms, he was seen as signifying parliamentary control over the Army. Issues of strategic policy during wartime were managed by the Northern and Southern Departments (the predecessors of today's Foreign Office and Home Office). From 1704 to 1855 the post of Secretary remained occupied by a minister of the second rank (although he was occasionally part of the Cabinet after 1794). Many of his responsibilities were transferred to the Secretary of State for War after the creation of that more senior post in 1794 (though the latter was also responsible for Britain's colonies from 1801, and renamed Secretary of State for War and the Colonies, an arrangement which only ceased with the establishment of the Colonial Office in 1854). From 1824 the British Empire (excepting India, which was administered separately by the East India Company and then the India Office) was divided by the War and Colonial Office into the following administrative departments: North America
Kennedy, Jr., Dan Olmsted, and David Kirby, as evidence that autistic children lack sufficient glutathione to remove mercury from their bodies and are therefore more susceptible to the toxicity of mercury in vaccines. However, James herself has cautioned against such conclusions, saying they are an overstatement of what her research actually shows; with specific regard to Kirby's claims, she said, "I'm afraid Mr. Kirby is overstating our conclusions -- which did not mention mercury. We simply showed for the first time that children with autism have lower levels of the major intracellular antioxidant, glutathione, which incidentally happens to be the major mechanism for mercury elimination from the body." On March 27, 2012, the Jane Botsford Johnson Foundation awarded a $1.2 million research grant to Arkansas Children's Hospital to fund research into autism biomarkers; this research was to be led by James. At the time the grant was being awarded, Johnson herself said that "Jill James' work at ACHRI holds great promise for the future of autism therapy and prevention."
=== Canonical initiation: Shine-Dalgarno sequence === The majority of mRNAs in E. coli are prefaced with a Shine-Dalgarno (SD) sequence. The SD sequence is recognized by an complementary "anti-SD" region on the 16S rRNA component of the 30S subunit. In the canonical model, the 30S ribosome is first joined up with the three initiation factors, forming an unstable "pre-initiation complex". The mRNA then pairs up with this anti-SD region, causing it to form a double-stranded RNA structure, roughly positioning the start codon at the P site. An initiating tRNAfMet arrives and is positioned with the help of IF2, starting the translation. There are a lot of uncertainties even in the canonical model. The initiation site has been shown to be not strictly limited to AUG. Well-known coding regions that do not have AUG initiation codons are those of lacI (GUG) and lacA (UUG) in the E. coli lac operon. Two studies have independently shown that 17 or more non-AUG start codons may initiate translation in E. coli. Nevertheless, AUG seems to at least be the strongest initiation codon among all possibilities. The SD sequence also does not appear strictly necessary, as a wide range of mRNAs lack them and are still translated, with an entire phylum of bacteria (Bacteroidetes) using no such sequence. Simply SD followed by AUG is also not sufficient to initiate translation. It does, at least, function as a very important initiating signal in E. coli.
=== Pharmacodynamics === Nor-LSD showed 5- to 29-fold lower affinity for the serotonin 5-HT2 receptor compared to LSD (Ki = 30–158 nM vs. 5.4 nM, respectively). It also showed affinity for the serotonin 5-HT1 receptor. In another more recent study however, nor-LSD showed similar or even higher affinities, activational potencies, and/or efficacies at the serotonin 5-HT1A, 5-HT2A, and 5-HT2B receptors as LSD, whereas it showed 36-fold lower affinity for the serotonin 5-HT2C receptor compared to LSD. Nor-LSD failed to completely substitute for LSD in rodent drug discrimination tests even at very high doses. The greatest degree of substitution with nor-LSD was 75% at a dose of 7,420 nM/kg, whereas 100% substitution occurred with LSD at a dose of 186 nM/kg (a 40-fold lower dose). The ED50Tooltip median effective dose was 2,594 nM/kg for nor-LSD and 46 nM/kg for LSD. Hence, nor-LSD was approximately 56-fold less potent than LSD in terms of producing LSD-like effects in rodents and failed to produce full LSD-like effects even at the highest assessed dose. In another study, nor-LSD failed to produce LSD-like electroencephalogram (EEG) changes in rabbits.
Sources: en.wikipedia.org
== Contemporary views == While Pan-Slavism remains popular in moderate and extremist political circles, its popularity subsided in the public. After the failure of Yugoslavism and Czechoslovakism, nationalism in Slavic nations now focus on self-definition and non-ethnic relations (like Hungary and Poland). The Russo-Ukrainian War had a divisive role, and pro-Russian sentiment became less popular. Tensions also rose on the Ukrainian side, and for economic reasons Ukrainian grain exports were banned for a time in multiple Slavic countries such as Poland and Slovakia, after the protest of farmers in multiple European countries.
== Retirement == Meurgues retired to Saint-Germain-de-Modéon, continuing to write articles in specialist magazines, sharing her knowledge in museology and scriptwriting, as well as restoring the family farm and creating an animal rescue refuge. She donated her scientific library to the Muséum d'Autun and is preparing a book Inventions et bricolages de la nature. She published Du jardin de Buffon à l'Afghanistan: mémoires d'une naturaliste in 2019. Geneviève Meurgues died on 21 December 2021, in her 91st year. According to her last wishes, her cremation was private and her ashes will be spread in the "Les Grands Bouchons" wood, where her vocation as a naturalist was born.
The American Society for Pharmacology and Experimental Therapeutics (ASPET) is a scientific society founded in late 1908 by John Jacob Abel of Johns Hopkins University (also the founder of the American Society for Biochemistry and Molecular Biology), with the aim of promoting the growth of pharmacological research. Many society members are researchers in basic and clinical pharmacology who help develop disease-fighting medications and therapeutics. ASPET is one of the constituent societies of the Federation of American Societies for Experimental Biology (FASEB). The society's headquarters are in Rockville, MD. The current president is Michael F. Jarvis.
Counter-Strike has over 20 years of competitive play beginning with the original Counter-Strike. The first major tournament was hosted in 2001 at the Cyberathlete Professional League which, along with World Cyber Games and Electronic Sports World Cup, were among the largest tournaments for the Counter-Strike series up to 2007. Since 2013, the Valve-sponsored Counter-Strike: Global Offensive Major Championships have become the most prestigious tournaments in the franchise's history, featuring prize pools of around $1,000,000.
== Laboratory use == Pentanes are relatively inexpensive and are the most volatile liquid alkanes at room temperature, so they are often used in the laboratory as solvents that can be conveniently and rapidly evaporated. However, because of their nonpolarity and lack of functionality, they dissolve only nonpolar and alkyl-rich compounds. Pentanes are miscible with most common nonpolar solvents such as chlorocarbons, aromatics, and ethers. They are often used in liquid chromatography.
Sources: en.wikipedia.org
=== Parliaments of the Union === 1st South African Parliament (1910–1915) – majority party: South African Party 2nd South African Parliament (1915–1920) – majority party: South African Party 3rd South African Parliament (1920–1921) – majority party: South African Party 4th South African Parliament (1921–1924) – majority party: South African Party 5th South African Parliament (1924–1929) – majority party: National Party 6th South African Parliament (1929–1933) – majority party: National Party 7th South African Parliament (1933–1938) – majority party: United Party 8th South African Parliament (1938–1943) – majority party: United Party 9th South African Parliament (1943–1948) – majority party: United Party 10th South African Parliament (1948–1953) – majority party: National Party 11th South African Parliament (1953–1958) – majority party: National Party 12th South African Parliament (1958–1961) – majority party: National Party
=== Blood clots === Chronic IV access leaves a foreign body in the vascular system, and blood clots on this IV line are common. Death can result from pulmonary embolism wherein a clot that starts on the IV line breaks off and travels to the lungs, blocking blood flow.
=== Second World War === The Special Air Service was a unit of the British Army during the Second World War that was formed in July 1941 by David Stirling and originally called "L" Detachment, Special Air Service Brigade – the "L" designation and Air Service name being a tie-in to a British disinformation campaign, trying to deceive the Axis into thinking there was a paratrooper regiment with numerous units operating in the area (the real SAS would "prove" to the Axis that the fake one existed). It was conceived as a commando force to operate behind enemy lines in the North African Campaign and initially consisted of five officers and 60 other ranks. Its first mission, in November 1941, was a parachute drop in support of the Operation Crusader offensive, codenamed Operation Squatter. Due to German resistance and adverse weather conditions, the mission was a disaster, with only 22 men, a third of the unit, making it back to base. The rest were either killed or captured. Its second mission was a major success. Transported by the Long Range Desert Group, it attacked three airfields in Libya, destroying 60 aircraft without loss. In September 1942, it was renamed 1st SAS, consisting at that time of four British squadrons, one Free French, one Greek, and the Folboat Section.
=== Occurrence === GGC occurs in human plasma in the range of 1 to 5 μM and intracellularly at 5 to 10 μM. The intracellular concentration is generally low because GGC is rapidly bonded with a glycine to form glutathione. This second and final reaction step in glutathione biosynthesis is catalysed by the activity of the ATP dependent glutathione synthetase enzyme.
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.
Laboratories commonly use liquid chromatography coupled with mass spectrometry to detect SR9009. The method can identify the compound and estimate concentration in a sample. Detection limits depend on the matrix and instrument.