Everything below concerns research chemical. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-07-11. Where a claim depends on a specific study, the study is described rather than over-claimed.
Storage recommendations for SR9009 reference material typically specify a freezer at -20 °C or lower, with protection from moisture and light. Repeated freeze-thaw cycles can degrade small molecules and introduce variability. Stock solutions in dimethyl sulfoxide are often aliquoted to avoid repeated handling. Stability studies may examine degradation under heat, humidity, and light exposure. The compound's thiophene and nitro groups can participate in reactions that alter analytical signals over time, so such changes affect quantitative results.
Quality control for research materials includes identity confirmation by nuclear magnetic resonance and purity assessment by high-performance liquid chromatography. Mass spectrometry provides molecular weight confirmation and can detect related impurities. Purchasers should request a certificate of analysis that lists lot-specific data. Online products advertised for human use often lack such documentation. Distinguishing legitimate research material from mislabeled or contaminated samples is a recurring challenge in independent testing, and independent laboratories may use orthogonal methods to verify identity.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Typical storage temperature | -20 °C or lower | Desiccated and protected from light |
| Common analytical method | LC-MS/MS | Detects parent drug and metabolites |
| Solubility class | Lipophilic; soluble in organic solvents | Low aqueous solubility |
| Molecular weight | 437.94 g/mol | Calculated from reported formula |
| Synonyms | SR9009; REV-ERB agonist | Code name used in scientific literature |
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 recommendations for SR9009 in a laboratory setting include storing the solid at low temperature, protected from light and moisture. The compound is often dissolved in dimethyl sulfoxide or ethanol for experiments. Solutions should be prepared with appropriate personal protective equipment and disposed of according to local rules. Stability data for long-term storage are limited, so stock solutions are typically kept cold and used within defined periods. Records of preparation date and concentration support reproducibility.
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 and metabolic gene expression. In laboratory experiments, SR9009 binds these receptors and alters transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. It is not a naturally occurring compound and has no approved therapeutic use. Research interest stems from its ability to modify energy metabolism in cells and animal models.
In rodent studies, SR9009 has been reported to increase mitochondrial content in skeletal muscle and improve exercise endurance under some conditions. These findings led to popular descriptions such as an exercise mimetic, although that term oversimplifies the biology. Effects vary by dose, timing, tissue, and model. The compound's influence on circadian pathways means that time of administration can matter in experiments. Whether similar metabolic changes occur in humans remains largely unexplored in controlled published trials.
Somalia's network of roads is 22,100 km (13,700 mi) long. As of 2000, 2,608 km (1,621 mi) streets are paved and 19,492 km (12,112 mi) are unpaved. A 750 km (470 mi) highway connects major cities in the northern part of the country, such as Bosaso, Galkayo and Garowe, with towns in the south. Sixty-two airports across Somalia accommodate aerial transportation; seven of these have paved runways. Among the latter, four airports have runways of over 3,047 metres (9,997 ft); two are between 2,438 and 3,047 m (7,999 and 9,997 ft) and one is 1,524 to 2,437 m (5,000 to 7,995 ft) long. There are fifty-five airports with unpaved landing areas. One has a runway of over 3,047 m; four are between 2,438 m and 3,047 m in length; twenty are 1,524 m to 2,437 m; twenty-four are 914 m to 1,523 m; and six are under 914 metres (2,999 ft). Major airports in the nation include the Aden Adde International Airport in Mogadishu, the Hargeisa International Airport in Hargeisa, the Kismayo Airport in Kismayo, the Baidoa Airport in Baidoa, and the Bender Qassim International Airport in Bosaso. Established in 1964, Somali Airlines was the flag carrier of Somalia. It suspended operations during the civil war. However, a reconstituted Somali government later began preparations in 2012 for an expected relaunch of the airline, with the first new Somali Airlines aircraft scheduled for delivery by the end of December 2013. According to the Somali Chamber of Commerce and Industry, the void created by the closure of Somali Airlines has since been filled by various Somali-owned private carriers.
=== Treatment === Due to their agitated behavior and confused mental state, people with acute Datura poisoning or intoxication are typically hospitalized. Gastric lavage and the administration of activated charcoal can be used to reduce the stomach's absorption of the ingested material, and the drug physostigmine is used to reverse the effect of the poisons. Benzodiazepines can be given to calm the patient's agitation, and supportive care with oxygen, hydration and symptomatic treatment is often provided. Observation of the patient is indicated until the symptoms resolve, usually from 24 to 36 hours after ingestion of the Datura.
Modafinil promotes wakefulness in narcoleptic dogs with non-functional orexin 2 receptors and in humans with type 1 narcolepsy, which is characterized by a marked loss of orexin-producing neurons. In contrast, the wake-promoting effects of modafinil are abolished in dopamine transporter knockout mice. The effects of modafinil on histamine, orexin, and other non-catecholaminergic systems may be secondary to its catecholaminergic effects.
GOT1/cAST, the cytosolic isoenzyme derives mainly from red blood cells and heart. GOT2/mAST, the mitochondrial isoenzyme is present predominantly in liver. These isoenzymes are thought to have evolved from a common ancestral AST via gene duplication, and they share a sequence homology of approximately 45%. AST has also been found in a number of microorganisms, including E. coli, H. mediterranei, and T. thermophilus. In E. coli, the enzyme is encoded by the aspCgene and has also been shown to exhibit the activity of an aromatic-amino-acid transaminase (EC 2.6.1.57).
The park was closed for renovations on July 11, 1988. The four-year project to rebuild Bryant Park entailed new entrances, repairs to paths and lighting, and a redesign of the park's garden by Lynden Miller. Biederman worked with William H. Whyte, a sociologist whose influence led them to implement two decisions. One was the placement of 2,000 movable chairs in the park. The other was to lower the park itself, because Bryant Park had been elevated from the street and isolated by tall hedges prior to the 1988 redesign. The 1988 renovation lowered the park to nearly street level and tore out the hedges, though much of the park was still slightly elevated. The park's restrooms, which had been closed for 35 years, were renovated as well. The BPRC also found that several of the sculptures would need to be repaired, and called on William Cullen Bryant's descendants and other entities to provide funding for the restoration of these sculptures. Landscape architect Laurie Olin of Hanna/Olin recalls that the design process focused on "the different abilities of people [who] use these spaces...as well as making spaces that people are comfortable being with each other in." The restoration cost $8.9 million, which included $5.7 million of city funding and $3.2 million of private funding. The renovation took place at the same time as the NYPL's expansion of the main branch's stacks underneath Bryant Park.
Sources: en.wikipedia.org
== Methods to screen protein–protein interactions == Though there are many methods to detect protein–protein interactions, the majority of these methods—such as co-immunoprecipitation, fluorescence resonance energy transfer (FRET) and dual polarisation interferometry—are not screening approaches.
== Side effects and withdrawal from market == On April 7, 2005, Pfizer withdrew Bextra from the U.S. market on recommendation by the FDA, citing an increased risk of heart attack and stroke and also the risk of a serious, sometimes fatal, skin reaction. This was a result of recent attention to prescription NSAIDs, such as Merck's Vioxx. Other reported side effects were angina and Stevens–Johnson syndrome. Pfizer first acknowledged cardiovascular risks associated with Bextra in October 2004. The American Heart Association soon after was presented with a report indicating patients using Bextra while recovering from heart surgery were 2.19 times more likely to suffer a stroke or heart attack than those taking placebos. In a large study published in The Journal of the American Medical Association in 2006, valdecoxib appeared less adverse for renal (kidney) disease and heart arrhythmia compared to Vioxx, but elevated renal risks were slightly suggested.
29 September Last Neanderthal?, the unanswered question of the Neanderthal extinction, with Sir Paul Mellars of the University of Cambridge; Pat Shipman of Penn State University; science writer James Shreeve; anthropologist Randall White of New York University; the first complete skeleton was found in 1908 and given to Marcellin Boule; Milford H.
== Amino-acid sequences == Analysis of the suite of known cyclotides reveals many sequence similarities that are important for understanding their unique physico-chemical properties, bioactivities and homology. The cyclotides fall into two main structural subfamilies. Moebius cyclotides, the less common of the two, contain a cis-proline in loop 5 that induces a local 180° backbone twist (hence likening it to a Möbius strip), whereas bracelet cyclotides do not. There is smaller variation in sequences within these subfamilies than between them. A third subfamily of cyclotides are trypsin inhibitors and are more homologous to a family of non-cyclic trypsin inhibitors from squash plants known as knottins or inhibitor cystine knots than they are to the other cyclotides. It is convenient to discuss sequences in terms of the backbone segments, or loops, between successive cysteine residues. The six cysteine residues are absolutely conserved throughout the cyclotide suite and presumably contribute to preserving the CCK motif. Although the cysteines appear essential to maintaining the overall fold, several other residues highly conserved in cyclotides are thought to provide additional stability. Throughout the known cyclotides loop 1 is the most conserved. Apart from the six cysteine residues, the glutamic acid and serine/threonine residues of loop 1 are the only residues to have 100% identity across the bracelet and Möbius subfamilies. Furthermore, the remaining residue of this loop exhibits only a conservative change i.e. glycine/alanine.
Sources: en.wikipedia.org
Liquid chromatography-tandem mass spectrometry is a common approach. It can detect the parent compound and its metabolites in biological matrices.
Research samples are typically kept frozen, desiccated, and protected from light. Stock solutions are often aliquoted to reduce freeze-thaw cycles.
High-performance liquid chromatography and nuclear magnetic resonance are standard for purity and identity. Mass spectrometry confirms molecular weight.
SR9009 is a synthetic small molecule studied as an agonist of the REV-ERB nuclear receptors. It is not an approved medicine, and its effects in humans are not well characterized.