certificate of analysis raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
This page was last updated on 2026-06-04 and is reviewed periodically as new material appears.
SR9009 is frequently discussed in fitness and research-chemical contexts, yet it has no approved medical indication. Regulatory agencies have not authorized it for human use, and it is not a standard prescription drug. Some sports organizations list it as a prohibited substance because of its potential performance-enhancing properties. Published human data are sparse, so claims about its effects in people often rely on animal models or anecdotal reports. Quality and identity of online materials can vary widely.
SR9009 is a synthetic small molecule studied as a REV-ERB agonist. REV-ERBα and REV-ERBβ are nuclear receptors that help regulate circadian rhythms and metabolic gene expression. The compound was identified in academic screening efforts to find synthetic ligands for these receptors. In cell and animal studies, SR9009 alters transcription of genes involved in lipid and glucose metabolism, and it can shift circadian behavior. It is not an approved therapeutic agent.
Mechanistically, SR9009 binds the ligand-binding domain of REV-ERBα/β and enhances recruitment of corepressor complexes. This represses target genes rather than activating them. Because REV-ERB proteins normally compete with ROR proteins at shared response elements, the net effect depends on tissue and timing. Researchers use SR9009 to probe how nuclear receptor signaling links the clock to metabolism, inflammation, and muscle biology. Findings are largely preclinical, and the precise contribution of each receptor subtype remains under study.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Small-molecule ligand; not a hormone or peptide |
| Molecular formula | C20H24ClN3O4S | Reported for the free base |
| CAS Registry Number | 1379686-30-2 | Unique chemical identifier |
| Common synonyms | SR9009; stenabolic | Stenabolic is informal and not an official name |
| Reported targets | REV-ERBα and REV-ERBβ | Nuclear receptors linked to circadian and metabolic regulation |
SR9009 is not approved as a medicine by major regulatory agencies. It is commonly sold as a research chemical, a category that may fall outside customary drug approval and quality rules. In sports, the World Anti-Doping Agency lists SR9009 as a prohibited substance. Athletes who use it can face sanctions if it is detected in a sample. Legal status varies by country, and importation may be restricted. Enforcement practices differ across borders.
Detection of SR9009 in biological samples usually employs liquid chromatography coupled with tandem mass spectrometry. This method can identify the parent compound and sometimes metabolites in urine or blood. Because exposure can be low and clearance may be rapid, sample timing and limits of detection matter. Laboratories validate assays for sensitivity and specificity. Results are interpreted alongside chain-of-custody and quality-control records. Urine is the common matrix for anti-doping analysis, while blood may be used in research settings.
Handling practices for SR9009 focus on minimizing degradation and contamination. The solid is generally stored desiccated at or below -20 °C, protected from light and moisture. Stock solutions are often prepared in dimethyl sulfoxide or ethanol, then aliquoted to avoid repeated freeze–thaw cycles. Aqueous solubility is low, so formulations for animal studies may require cosolvents or suspending agents. Personnel should follow institutional chemical safety procedures, because toxicological data for humans are incomplete.
Regulatory status varies by country and intended use. Major drug agencies have not granted marketing authorization for SR9009 as a medicine, and it is not listed as a controlled substance in many jurisdictions. It is often sold as a research chemical, a category that may fall outside pharmaceutical manufacturing rules. Buyers should verify local laws and supplier documentation, including certificates of analysis. The lack of standardized quality controls raises concerns about identity, purity, and actual content in products marketed online.
In laboratory settings, SR9009 is commonly identified by its molecular structure and its interaction with REV-ERB receptors. Vendors may list it under synonyms such as Stenabolic or REV-ERB agonist, but those names do not define purity or identity. Analytical confirmation typically uses high-performance liquid chromatography with ultraviolet detection or liquid chromatography–mass spectrometry. A reference standard is needed to compare retention time and mass spectrum, because the compound can be confused with related research chemicals.
18 hours) in CYP2D6 poor metabolizers versus CYP2D6 extensive metabolizers. Circulating 4-hydroxyatomoxetine levels are about 1% of those of circulating atomoxetine levels in CYP2D6 extensive metabolizers and about 0.1% of those of circulating atomoxetine levels in CYP2D6 poor metabolizers. Similarly, N-desmethylatomoxetine circulates at much lower levels than atomoxetine, about 5% of those of atomoxetine in CYP2D6 extensive metabolizers and 45% of those of atomoxetine in CYP2D6 poor metabolizers. 4-Hydroxyatomoxetine shows similar affinity for the norepinephrine transporter (NET) as atomoxetine but much higher affinity for the serotonin transporter (SERT) in comparison (with SERT affinity ~14-fold lower than NET affinity), whereas N-desmethylatomoxetine shows much lower affinity for the monoamine transporters (MATs) than atomoxetine and 4-hydroxyatomoxetine (with NET affinity ~20-fold lower than that of atomoxetine). Despite differences in atomoxetine metabolism, CYP2D6 status has been said in literature reviews to not affect the overall tolerability and safety of atomoxetine. However, poor metabolizers did show greater heart rate increase (+9.4–11 bpm vs. +5.0–7.5 bpm), blood pressure increase (4.21 mm Hg vs. 2.13 mm Hg systolic and 2.75 mg Hg vs. 2.40 mm Hg diastolic), and more weight loss (–1.2 kg vs. +0.8 mg) than extensive metabolizers.
=== Comparison with other antibiotics === Like all carbapenem antibiotics, ertapenem has a broader spectrum of activity than other beta-lactams like penicillins and cephalosporins. Similar to doripenem, meropenem and biapenem, ertapenem has slightly better activity against many Gram-negative bacteria than other carbapenems such as imipenem. In contrast to imipenem, doripenem and meropenem, it is not active against Enterococcus, Pseudomonas and Acinetobacter species. For diabetic foot infections, ertapenem as a single treatment or in combination with vancomycin has been found to be more effective and have fewer side effects than tigecycline, but in severe cases it is less effective than piperacillin/tazobactam. Regarding pharmacokinetics, imipenem, doripenem and meropenem have lower plasma protein bindings (up to 25%) and shorter half-lives (about one hour) than ertapenem.
A given stereocenter has two possible configurations (R and S), which give rise to stereoisomers (diastereomers and enantiomers) in molecules with one or more stereocenter. For a chiral molecule with one or more stereocenter, the enantiomer corresponds to the stereoisomer in which every stereocenter has the opposite configuration. An organic compound with only one stereogenic carbon is always chiral. On the other hand, an organic compound with multiple stereogenic carbons is typically, but not always, chiral. In particular, if the stereocenters are configured in such a way that the molecule can take a conformation having a plane of symmetry or an inversion point, then the molecule is achiral and is known as a meso compound. Molecules with chirality arising from one or more stereocenters are classified as possessing central chirality. There are two other types of stereogenic elements that can give rise to chirality, a stereogenic axis (axial chirality) and a stereogenic plane (planar chirality). Finally, the inherent curvature of a molecule can also give rise to chirality (inherent chirality). These types of chirality are far less common than central chirality. BINOL is a typical example of an axially chiral molecule, while trans-cyclooctene is a commonly cited example of a planar chiral molecule. Finally, helicene possesses helical chirality, which is one type of inherent chirality. Chirality is an important concept for stereochemistry and biochemistry.
This reflected a new PLAN tactic of laying anti-personnel mines parallel to their anti-tank mines to kill policemen or soldiers either engaging in preliminary mine detection or inspecting the scene of a previous blast. In 1972, South Africa acknowledged that two more policemen had died and another three had been injured as a result of mines. The proliferation of mines in the Caprivi and other rural areas posed a serious concern to the South African government, as they were relatively easy for a PLAN cadre to conceal and plant with minimal chance of detection. Sweeping the roads for mines with hand held mine detectors was possible, but too slow and tedious to be a practical means of ensuring swift police movement or keeping routes open for civilian use. The SADF possessed some mine clearance equipment, including flails and ploughs mounted on tanks, but these were not considered practical either. The sheer distances of road vulnerable to PLAN sappers every day was simply too vast for daily detection and clearance efforts. For the SADF and the police, the only other viable option was the adoption of armoured personnel carriers with mine-proof hulls that could move quickly on roads with little risk to their passengers even if a mine was encountered. This would evolve into a new class of military vehicle, the mine resistant and ambush protected vehicle (MRAP). By the end of 1972, the South African police were carrying out most of their patrols in the Caprivi Strip with mineproofed vehicles.
Sources: en.wikipedia.org
==== Censorship ==== During the scandal, China's media was ordered to tone down coverage of the unfolding scandal to prevent unrest. News editors were told to adhere to the official copy provided by China's state news agency, Xinhua News Agency, and to emphasize other news instead. China Central Television shifted its reporting emphasis to the launch of Shenzhou VII, with the announcement of the AQSIQ test results relegated to the final item on the CCTV evening news. As a result of media suppression, Chinese consumers were ill-informed about the extent of global recalls. According to Chinese journalists, discussion of the causes of the crisis, government responsibility, questions about government complicity with dairy companies, was forbidden. On 2 January, a website created by individuals protesting against Sanlu was also blocked by the authorities. A group of parents whose children were rendered ill by melamine-contaminated milk held a news conference to draw attention to the plight of their sick children; five were allegedly detained by police and taken to a labour camp outside Beijing. They were released a day later. In 2012, Jiang Weisuo, a 44-year-old general manager of a dairy products plant in Shaanxi province, was rumoured to have been murdered in Xi'an city. It was Jiang who had first alerted authorities to the scandal. According to the Xi'an Evening News, Jiang died in hospital on 12 November from knife wounds inflicted by his wife, Yang Ping, but the purported murder by his wife was subsequently reported to be incorrect.
=== Overproduction of uric acid === One of the first symptoms of the disease is the presence of sand-like crystals of uric acid in the diapers of the affected infant. Overproduction of uric acid may lead to the development of uric acid crystals or stones in the kidneys, ureters, or bladder. Such crystals deposited in joints later in the disease may produce gout-like arthritis, with swelling and tenderness. The overproduction of uric acid is present at birth, but may not be recognized by routine clinical laboratory testing methods. The serum uric acid concentration is often normal, as the excess purines are promptly eliminated in the urine. The crystals usually appear as an orange grainy material, or they may coalesce to form either multiple tiny stones or distinct large stones that are difficult to pass. The stones, or calculi, usually cause hematuria (blood in the urine) and increase the risk of urinary tract infection. Some affected people have kidney damage due to such kidney stones. Stones may be the presenting feature of the disease, but can go undetected for months or even years.
This is because the fundamental principle of labour law is that employees' unequal bargaining power justifies substitution of rules in property and contract with positive social rights so that people may earn a living to fully participate in a democratic society. The EU's competences generally follow principles codified in the Community Charter of the Fundamental Social Rights of Workers 1989, introduced in the "social chapter" of the Treaty of Maastricht. Initially the UK had opted-out, because of opposition by the Conservative Party, but was acceded to when the Labour Party won the 1997 general election in the Treaty of Amsterdam.
Sources: en.wikipedia.org
SR9009 is a synthetic compound investigated as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is used in preclinical research on circadian rhythm and metabolism. It is not an approved drug.
No. It has no approved medical indication, and human safety and efficacy data are limited. It appears in research chemical markets and is banned by some sports authorities.
Natural ligands include heme and certain metabolites; SR9009 is a synthetic small molecule with higher potency and selectivity in some assays. Its effects depend on cell type and timing. It is not a naturally occurring compound.
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.