A practical reference on REV-ERB agonist: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-03-09 and is reviewed periodically as new material appears.
Storage conditions for research-grade SR9009 generally involve a freezer at approximately minus twenty degrees Celsius, sometimes lower for long-term preservation. Containers should remain tightly closed and protected from light. Desiccants may be used to limit moisture uptake. Solutions are often stored in aliquots to avoid repeated warming and cooling. Stability data for the compound under various conditions are limited, so laboratories typically follow supplier recommendations and verify performance through periodic analytical checks rather than assuming indefinite stability.
Identity and purity testing for SR9009 commonly uses liquid chromatography coupled with tandem mass spectrometry. This method separates the compound from matrix components and detects it by mass-to-charge transitions, providing sensitive and specific confirmation. Nuclear magnetic resonance spectroscopy can support structural identification, while high-performance liquid chromatography with ultraviolet detection may estimate purity. Because online products labeled as SR9009 may contain other substances or no active compound at all, independent verification is important in research settings. Certificates of analysis are useful but not a substitute for in-house testing.
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.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Typical for research-grade material |
| Solubility | Soluble in DMSO and ethanol; low aqueous solubility | Organic stock solutions are common |
| Typical storage temperature | -20 °C or lower | Protect from light and moisture |
| Common analytical method | LC-MS/MS | Used for detection and confirmation |
| Common synonyms | SR9009; Stenabolic | Stenabolic is an informal name |
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.
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.
In laboratory settings, SR9009 is typically characterized by liquid chromatography–mass spectrometry (LC-MS) or high-performance liquid chromatography with ultraviolet detection (HPLC-UV). These methods can confirm identity and estimate purity, but they require reference standards for accurate quantification. Because SR9009 is not a licensed pharmaceutical, no harmonized pharmacopeial monograph exists. Laboratories often validate in-house methods for matrices such as plasma, urine, or cell culture media. Sample preparation may involve protein precipitation or liquid-liquid extraction before analysis.
Selenium forms several allotropes that interconvert with temperature changes, depending somewhat on the rate of temperature change. When prepared in chemical reactions, selenium is usually an amorphous, brick-red powder. When rapidly melted, it forms the black, vitreous form, usually sold commercially as beads. The structure of black selenium is irregular and complex and consists of polymeric rings with up to 1000 atoms per ring. Black selenium is a brittle, lustrous solid that is slightly soluble in CS2. Upon heating, it softens at 50 °C and converts to gray selenium at 180 °C; the transformation temperature is reduced by presence of halogens and amines. The red α, β, and γ forms are produced from solutions of black selenium by varying the evaporation rate of the solvent (usually CS2). They all have a relatively low, monoclinic crystal symmetry (space group 14) and contain nearly identical puckered cyclooctaselenium (Se8) rings as in sulfur. The eight atoms of a ring are not equivalent (i.e. they are not mapped one onto another by any symmetry operation), and in fact in the γ-monoclinic form, half the rings are in one configuration (and its mirror image) and half in another. The packing is most dense in the α form. In the Se8 rings, the Se–Se distance varies depending on where the pair of atoms is in the ring, but the average is 233.5 pm, and the Se–Se–Se angle is on average 105.7°. Other selenium allotropes may contain Se6 or Se7 rings.
== Controversies over the hydrogen bond == Huggins believed that he had been the first to suggest the concept of the hydrogen bond, while he was a student under G. N. Lewis at the Chemical Laboratory of the University of California, Berkeley. According to his account, he wrote a thesis in 1919 in which the H-bond was introduced and applied to tautomerism in acetoacetic acid. Unfortunately, no hard copy of the thesis remains. The first extant publication of the H-bond was that of Wendell Latimer and Worth Rodebush in 1920, who cite Huggins' unpublished work in a footnote. (They were fellow scientists at the Chemical Laboratory.)
While uterine prolapse is rarely life-threatening, the symptoms associated with uterine prolapse can have a significant impact on quality of life. The severity of prolapse symptoms does not necessarily correlate with the degree of prolapse, and one may experience little to no bothersome symptoms with even advanced prolapse. Additionally, different forms of pelvic organ prolapse often present with similar symptoms. Most women who experience pelvic organ prolapse do not have symptoms. When symptoms are present, the most common and most specific symptoms for uterine prolapse—and organ prolapse in general—into the vagina are bulge symptoms, such as pelvic pressure, vaginal fullness, or a palpable vaginal bulge, and these symptoms are often more common and more severe if the prolapse reaches the vaginal hymen. Urinary symptoms, such as uncontrollable loss of urine or difficulty urinating, may also be present. Complete uterine prolapse in which the uterus protrudes through the vaginal hymen is known as procidentia. In the absence of treatment, symptoms of procidentia may include purulent vaginal discharge, ulceration, and bleeding. Complications of procidentia include urinary obstruction. People may also report sexual dysfunction symptoms, such as pain with sexual intercourse and decreased libido. There is conflicting data concerning the effect of pelvic organ prolapse on sexual function. The severity of the symptoms associated with prolapse seems to have a negative effect on sexual activity and reported satisfaction.
The Broad Front for Democracy (Spanish: Frente Amplio por la Democracia) is a Panamanian political party originally founded in 2013. At the 2014 Panamanian general election, the candidate's party was Genaro López for the Presidency. At the legislative election, the party had 1.0% votes and no seats. The party dissolved in 2014, was re-founded in 2018 and dissolved again in 2019. The party attempted to reconstitute a third time starting in 2020–2021, gathering signatures over several years. On 24 August 2025, it held a national convention formally re-establishing itself as a party, electing economist and 2024 independent presidential candidate Maribel Gordón as its president. On 17 October 2025, Panama's Electoral Tribunal issued Resolution No. 11, officially recognizing the FAD as a legally constituted political party. with the goal of contesting the 2029 general election.
Baby Burger: small beef patty (1.6 ounces (45 g)), ketchup, unseeded hamburger bun, (optional) cheese slice Mama Burger: regular beef patty (3 ounces (85 g)), onion slice, pickles, ketchup, mustard, Teen Sauce, sesame seed bun, (optional) cheese slice Teen Burger: regular beef patty (3 ounces (85 g)), onion slice, pickles, ketchup, mustard, bacon, Teen Sauce, lettuce, tomato, sesame seed bun, cheese slice Papa Burger: two regular beef patties (6 ounces (170 g) total), onion slice, pickles, ketchup, mustard, Teen Sauce, sesame seed bun, (optional) cheese slice Grandpa Burger: three regular beef patties (9 ounces (260 g) total), onion slice, pickles, ketchup, mustard, Teen Sauce, sesame seed bun, (optional) cheese slice
Sources: en.wikipedia.org
Primary malignant brain tumors (PMBT) and brain metastases have a high impact on patients with both high morbidity and mortality rates. For patients impacted by this, treatment consists primarily of palliative care. However, multimodal therapy using intra-CSF chemotherapy has shown promise in overt leukemic or lymphomatous meningeosis and primary CNS lymphomas. This form of chemotherapy is less toxic while maintaining similar efficacy to cranial irradiation, by preventing the infiltration and proliferation of leukemic and tumor cells into the leptomeninges. In a 2019 study, autologous non-genetically modified adipose-derived stromal vascular fraction (ADSVF) was injected into 24 patients using an ICV injection procedure. Seven other patients were injected through ventriculoperitoneal shunts. These seven patients were being treated for varying neurodegenerative disorders including Alzheimer's disease (AD), amyotrophic lateral sclerosis (ALS), progressive multiple sclerosis (MS-P), Parkinson's, spinal cord injury, traumatic brain injury, and stroke. A total of 113 injections were performed on the 31 patients, with one patient having up to 15 injections over three years. Follow-up was conducted for each participant, with varying follow-up times. One patient developed an infection from their implant, and four patients required hospitalization after their injections. Overall, the results indicate that ICV injections, both single and repeat, are safe.
== Intake == Under normal circumstances, arenobufagin is a solid. In Chinese traditional medicine, it in ingested either orally or topically, for example to the skin. Little is known about its toxicokinetics.
Throughout fermentation ammonium is the primary form of assimilable nitrogen available to yeast. However, at crushing the juice may contain anywhere from 0 to 150 mg/L of ammonium salts, depending on the how much nitrogen the grapevine received in the vineyard. In the cell, the inorganic ammonia and ammonium ions get "fixed" through a series of chemical reactions that ultimately yields the organic nitrogen source glutamate. The ammonium ion also serves as an allosteric regulator for one of the enzymes used in glycolysis and may also have an effect on how the yeast cell transports glucose and fructose into the cell. The proteins used in the main glucose transport system have been shown to have a half-life of 12 hours. In the studies that put yeast cells through "ammonia starvation" the entire system shut down after 50 hours which gives strong evidence that a lack of ammonia/ammonium can create increase risk of having a stuck fermentation. Glutathione (GSH: L-gamma-glutamyl-L-cysteinylglycine) is present in high concentrations up to 10 mM in yeast cells. It assumes a pivotal role in response to sulfur and nitrogen starvation. Ammonia is not used by bacteria such as Acetobacter and the lactic acid bacteria used in malolactic fermentation.
In gas chromatography, the Kovats retention index (shorter Kovats index, retention index; plural retention indices) is used to convert retention times into system-independent constants. The index is named after the Hungarian-born Swiss chemist Ervin Kováts (1927–2012), who outlined the concept in the 1950s while performing research into the composition of the essential oils. The retention index of a chemical compound is retention time interpolated between adjacent n-alkanes. While retention times vary with the individual chromatographic system (e.g. with regard to column length, film thickness, diameter and inlet pressure), the derived retention indices are quite independent of these parameters and allow comparing values measured by different analytical laboratories under varying conditions and analysis times from seconds to hours. Tables of retention indices are used to identify peaks by comparing measured retention indices with the tabulated values.
The roots of modern bird collections are found in the 18th- and 19th-century explorations of Europeans intent on documenting global plant and animal diversity. It was a fashion to collect and display natural curiosities in Victorian England. Some wealthy cabinet naturalists were able to amass large collections using networks of field collectors. These early collections were not intended for scientific study and the collectors gave importance to aesthetics rather than scientific value. It grew into a more scientific pursuit much later.
Sources: en.wikipedia.org
=== Names === Itopride is available under various brand names including Ganaton (Japan, India, Czech Republic, Russian Federation), Itoprid PMCS (Czech Republic, Slovakia), Itomed (Kyrgyzstan, Kazakhstan, Moldova, Russia, Ukraine, Uzbekistan), Prokit (Poland), and Itogard (Nepal). In Mexico, itopride is sold by Takeda Laboratories under the brand name Dagla. In Bulgaria and other countries of East Europe itopride is sold by Zentiva under the brand name Zirid
Galloway did not seek re-election in Bethnal Green and Bow at the 2010 general election, fulfilling a pledge he made to only serve one parliamentary term in the constituency. He instead opted to stand in the neighbouring constituency of Poplar and Limehouse and received 8,160 votes coming third after the Labour and Conservative candidates.
=== Emigration === In an interview with VICE News' Krishna Andavolu shortly after Bukele's inauguration, he said that he "share[s] the same concern President Trump [has with] immigration, but for different reasons [...] [Trump] doesn't want our people to go; I don't want our people to leave." In a 2021 interview on Fox News' Tucker Carlson Tonight, Bukele attributed mass emigration from Central America to the United States to the region's "lack of economic opportunity" and "lack of security" and described the level of emigration to the United States as "immoral". He argued that emigration strained the United States and impeded domestic efforts to improve living conditions in El Salvador.
The leveraged buyout of Electronic Arts is completed, with a consortium led by Saudi Arabia's Public Investment Fund and including Silver Lake and Affinity Partners acquiring the American video game publisher for US$55 billion and taking it private. The transaction is the largest leveraged buyout in history. The Senate confirms Dr. Erica Schwartz as the director of the Centers for Disease Control and Prevention to succeed acting director Dr. Jay Bhattacharya. August 6 A Republican-led US Senate committee votes to hold former Chief Medical Advisor to the President Anthony Fauci in contempt of Congress, escalating efforts to blame him for potential COVID-19 pandemic mistakes. United States Senator Mitch McConnell is discharged from a rehabilitation center after more than seven weeks of recovery following a June hospitalization. He will continue recovering at home while remaining away from the Senate. A judge in New Mexico orders Meta Platforms to pay an additional $567 million in penalties over five years for liability in knowingly harming children's mental health. August 7 A sweeping Russia sanctions bill negotiated by the late Senator Lindsey Graham is passed by the Senate to force Russian President Vladimir Putin to end the Russo-Ukrainian war. US opens test ranges for small companies to receive munitions faster. Former U.S. president Joe Biden's son Hunter says in a BBC interview that Biden's prostate cancer has metastasized into his bones and further. August 8 The Senate confirms Todd Blanche as the United States attorney general to succeed Pam Bondi.
Sources: en.wikipedia.org
Research-grade SR9009 is typically stored frozen at about minus twenty degrees Celsius, protected from light and moisture. Stock solutions are often kept in aliquots to avoid repeated freeze-thaw cycles. Specific storage conditions should follow the supplier's documentation.
Liquid chromatography with tandem mass spectrometry is widely used to detect and confirm SR9009 in laboratory samples. The technique offers high sensitivity and can distinguish the target compound from related substances. Nuclear magnetic resonance and ultraviolet detection may support identity and purity checks.
Online products labeled as SR9009 may vary in identity, purity, and actual content. Independent testing helps confirm that a sample matches its label and does not contain unexpected contaminants. This is important for reproducible research and for interpreting experimental results.
Liquid chromatography with mass spectrometry is a common approach. Ultraviolet detection and nuclear magnetic resonance can support identification when suitable standards are available.