analytical standard is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2025-09-01. Where a claim depends on a specific study, the study is described rather than over-claimed.
Analytical identification of SR9009 typically relies on liquid chromatography coupled with tandem mass spectrometry. In biological samples, researchers first separate the compound from matrix components using protein precipitation, liquid-liquid extraction, or solid-phase extraction. High-performance liquid chromatography with ultraviolet detection and nuclear magnetic resonance spectroscopy can support structural confirmation of reference materials. Because SR9009 is a small, relatively lipophilic molecule, reverse-phase columns and acidic mobile phases are common. Laboratories often include isotope-labeled internal standards to improve quantification and to correct for ion suppression.
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.
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.
SR9009 is often grouped with compounds studied for circadian and metabolic regulation rather than with classical anabolic steroids. Its interactions with nuclear receptors differ from those of androgen receptor ligands, and its proposed mechanisms involve transcriptional control rather than direct hormone signaling. Some sources classify it as a metabolic modulator because of observed effects on energy utilization. The distinction matters for regulation and for interpreting research results across different compound classes.
| Property | Value | Notes |
|---|---|---|
| Common synonyms | SR9009; Stenabolic | Nickname is not a chemical name. |
| Typical analytical method | LC-MS/MS | Often with isotope-labeled internal standard. |
| Storage temperature | -20 °C | Desiccated and protected from light. |
| Solution stability | DMSO stock; avoid freeze-thaw | Store at -20 to -80 °C. |
| Regulatory status | Not approved; varies by country | May be restricted as research chemical. |
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not an approved medicine and has no established human therapeutic use. The compound appears in scientific literature as a tool for probing circadian and metabolic regulation. Online sellers often label it as a research chemical, sometimes using the nickname Stenabolic. Its chemical identity is distinct from selective androgen receptor modulators, stimulants, and peroxisome proliferator-activated receptor delta agonists. Researchers use it mainly in cell and animal experiments.
At the molecular level, SR9009 binds REV-ERBα and REV-ERBβ and alters their repressive activity on target genes. These nuclear receptors help regulate the circadian clock, lipid synthesis, glucose metabolism, and inflammatory pathways. By changing transcription, the compound can shift the timing or magnitude of downstream metabolic processes in model systems. It does not act through androgen receptors or adenosine receptors, which distinguishes it from several substances sold for athletic performance. Whether the same transcriptional changes occur in humans at tolerable exposures remains an open question because controlled human studies are lacking.
Preclinical reports describe effects on exercise endurance, mitochondrial content, and lipid profiles in rodents, but these findings come from specific experimental conditions. Many studies use high doses or delivery methods that may not translate directly to human use. SR9009 has been reported to have low oral bioavailability and a short half-life, which complicates interpretation of oral dosing studies. It is not established as safe or effective for any indication. Literature discussions often separate its pharmacological mechanism from unverified claims made in fitness and supplement markets.
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.
Detection of SR9009 in biological samples usually relies on liquid chromatography coupled to tandem mass spectrometry. This approach separates the compound from matrix components and identifies it by mass transitions. Because SR9009 can undergo metabolism, laboratories often look for both parent drug and specific metabolites. Sample preparation may involve protein precipitation or solid-phase extraction. Method validation examines sensitivity, carryover, and interference from related substances, and reference standards are required for accurate calibration.
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.
In the meanwhile, Peng Liyuan and Melania Trump visited the Smithsonian Institution’s National Museum of Asian Art, where they spent 45 minutes. Museum director Chase F. Robinson later said Melania had selected the venue. They visited various exhibitions including viewing a jade disk from the Shang dynasty, visiting The Peacock Room, viewing a 18th-century Qianlong-period Chinese porcelain, as well as looking at a scroll painting from the Yuan dynasty. Peng praised the US for its return of Chinese cultural relics to China. Melania and Peng watched American teenagers from the youth choir from Hope Chinese School sing Chinese songs including "Jasmine Flower" and "Songs & Smiles"; Peng encouraged them to continue learning Chinese language and culture. After the meeting finished, Trump said they had a "great meeting" and the two leaders toured the renovated White House grounds including the new Marine One helicopter on the newly constructed helipad. Trump said of Xi, "He likes granite. He’s an expert on stone, aside from many other things, and he loves good granite". Trump also showed Xi the Presidential Walk of Fame, where he showed him the framed "autopen" in place of former president Joe Biden.
Hydrogen peroxide has been classified by the American Conference of Governmental Industrial Hygienists (ACGIH) as a "known animal carcinogen, with unknown relevance on humans". For workplaces where there is a risk of exposure to the hazardous concentrations of the vapours, continuous monitors for hydrogen peroxide should be used. Information on the hazards of hydrogen peroxide is available from OSHA and from the ATSDR.
AdventHealth Polk South, Inc. (doing business as AdventHealth Lake Wales) is a non-profit hospital campus in Lake Wales, Florida, United States owned by AdventHealth. The medical facility is a tertiary and primary stroke center that has multiple specialties. It was purchased from Community Health Systems in May 2019.
2 November – Andy Street, the Mayor of the West Midlands, has written to the Home Secretary requesting that his office be granted the powers of the area's Police and Crime Commissioner after the next mayoral election because "crime in this region has more than doubled... and I simply cannot allow it to go on any longer". 5 November – The Metropolitan Police ends its relationship with adviser Attiq Malik after video emerged of him chanting a pro-Palestinian slogan during a speech to a group in 2021. Surrey County Council declares an emergency after thousands of properties are left without water following a technical problem at a Thames Water treatment works, which is attributed to Storm Ciarán. 7 November – Anastrozole, a drug used for a number of years to treat breast cancer, is licensed for use in England as a preventative option. West Yorkshire Police launch a murder investigation after a 15-year-old boy dies following a stabbing near a school in Leeds. He is later named as Alfie Lewis, a former student at Horsforth School. 9 November – A 14-year-old boy is remanded in custody charged with the murder of Alfie Lewis. Labour's Caroline Woodley is elected mayor of Hackney in London in a by-election. 10 November – Following trial and conviction at Leicester Crown Court, Katie Tidmarsh is sentenced to life imprisonment with a minimum term of 17 years for the 2012 murder of Ruby Thompson, a one-year-old child she had hoped to adopt.
Sources: en.wikipedia.org
=== Federal politics (2011–2025) === She was named the Conservative Party's candidate for Delta—Richmond East in March 2011, and won the seat in that year's federal election. During the 41st Parliament, she served as member of the House of Commons Standing Committee on Justice and Human Rights, and sat on a selection panel to help choose a replacement for Marie Deschamps of Quebec, who retired as puisne justice of the Supreme Court of Canada. She was named Parliamentary Secretary to the Minister of Justice in May 2011, and as Associate Minister of National Defence on February 22, 2013. She then served as the Minister of National Revenue from July 15, 2013, until November 4, 2015.
== Signs and symptoms == The defining sign of kwashiorkor in children is bilateral edema in the feet. Edema may also involve the hands, trunk, and face. Kwashiorkor is characterized by a fatty liver. This fatty liver of the undernutrition phenotype is often accompanied by evidence of inflammation and fibrosis. Whereas a fatty liver of undernutrition is a consistent feature of kwashiorkor, it is only encountered sometimes in children with marasmus. In addition to this characteristic hepatic steatosis, kwashiorkor is marked by a parallel pattern of multi-organ dysfunction. Organs often affected in children with kwashiorkor include the kidneys, pancreas, heart, and nervous system. Other findings that may be encountered on physical exam include a distended abdomen, hair thinning, loss of teeth, skin or hair depigmentation, and dermatitis. Children with kwashiorkor often develop irritability and anorexia. Generally, kwashiorkor is treated by introducing a high-quality source of protein to the diet. Ready-to-use therapeutic food (RUTF) as well as F-100 and F-75 milk powders, which both include skim milk powder, are recommended for the treatment of kwashiorkor. These products are designed for use in low-resource settings. The limited number of kwashiorkor cases that occur in high resource settings, where there is good access to advanced therapeutic tools, are typically treated with partially hydrolyzed or elemental enteral formulas, with parenteral nutrition provided in extreme cases.
Acecarbromal (INN) (brand names Sedamyl, Abasin, Carbased, Paxarel, Sedacetyl, numerous others), also known as acetylcarbromal and acetyladalin, is a hypnotic and sedative drug of the ureide (acylurea) group discovered by Bayer in 1917 that was formerly marketed in the United States and Europe. It is also used in combination with extract of quebracho and vitamin E as a treatment for erectile dysfunction under the brand name Afrodor in Europe. Acecarbromal is structurally related to the barbiturates, which are basically cyclized ureas. Prolonged use is not recommended as it can cause bromine poisoning.
Sources: en.wikipedia.org
== 2023 trial == Police arrested Letby on 3 July 2018 on suspicion of eight counts of murder and six counts of attempted murder, and searched her home. Officers were also seen at her parents' property the same day. Following her arrest, detectives began reviewing her entire nursing career, including her time at Liverpool Women's Hospital. She was bailed on 6 July, rearrested in June 2019, and bailed again shortly afterwards. Letby was arrested for a third time in November 2020 and was remanded in custody. She denied all allegations, attributing the collapses to issues such as staffing levels and hygiene. Letby's trial opened at Manchester Crown Court on 4 October 2022 before Mr Justice Goss. She pleaded not guilty to seven counts of murder and 15 counts of attempted murder. The infants were anonymised as Baby A to Baby Q. Reporting restrictions also protected the identities of nine colleagues who gave evidence. Two years before the trial, Mrs Justice Steyn had ordered that the surviving infants could not be identified until adulthood. Several adult witnesses were also granted anonymity, which the court considered necessary to secure their testimony.
== Proof == The detection as well as the quantitative determination of lactobacillic acid is carried out - as is usual for fatty acids - by gas chromatography of the methyl ester, often as gas chromatography with mass spectrometry coupling (GC/MS). Because of the cyclopropane ring, however, care must be taken to use a suitable methylation reagent. Not suitable, for example, is hydrogen chloride in anhydrous methanol, as this reagent can react with the cyclopropane ring, resulting in a branched-chain fatty acid with a methoxy group. However, sodium methanolate in anhydrous methanol is well suited, as is sodium hydroxide or potassium hydroxide in methanol. The formation of 3-pyridyl methyl esters (picolinyl esters) with nicotinyl alcohol is particularly recommended for structural elucidation using mass spectrometry methods. (pyridylmethanol) is recommended.
NRgize Lifestyle Cafe (United States) Planet Smoothie – a chain of smoothie restaurants with stores in Alabama, Arizona, Arkansas, California, Florida, Georgia, Maryland, Massachusetts, Nebraska, New York, North Carolina, Pennsylvania, South Carolina, Texas and Virginia. Pinkberry – a chain of frozen dessert restaurants with locations in Canada, Chile, Egypt, India, Indonesia, Japan, Nigeria, Saudi Arabia, Jordan, Panama, Peru, Oman, Qatar, United Arab Emirates, United States, Philippines and Thailand. Ranch One – a chain of restaurants specializing in grilled chicken breast sandwiches, with locations in Kuwait and the United States. Rollerz (California, D.C., Illinois, Nevada and Texas) Samurai Sam's Teriyaki Grill (Kuwait and United States) Surf City Squeeze – a chain of smoothie restaurants with stores in Canada, Saudi Arabia, Curaçao/Netherlands Antilles and United States. Sweet Frog - a chain of frozen yogurt restaurants with stores in the United States (East Coast, South, Mideast, Midwest, West Coast only) and the Dominican Republic. Taco Time (Canada, Kuwait, Curaçao/Netherlands Antilles; and United States, except locations primarily in western Washington state operated by Taco Time Northwest) Tasti D-Lite – a New York-based fast food company which mainly sells frozen dessert products, it has locations in Florida, Maryland, Nevada, New Jersey, New York and Texas.
== Genes == In humans, the gene for the alpha subunit is located at cytogenetic location 6q14.3. It is expressed in two cell types, most notably the basophils of the anterior pituitary. The gene for the FSH beta subunit is located on chromosome 11p13, and is expressed in gonadotropes of the pituitary cells, controlled by GnRH, inhibited by inhibin, and enhanced by activin.
Sources: en.wikipedia.org
The most common approach is liquid chromatography-tandem mass spectrometry, often after extraction from blood, urine, or tissue. Ultraviolet detection and nuclear magnetic resonance spectroscopy are used mainly for reference material characterization. Isotope-labeled internal standards improve accuracy.
Solid material is usually kept at -20 °C, desiccated, and protected from light. Dimethyl sulfoxide stocks should be stored cold and subjected to minimal freeze-thaw cycles. Aqueous solutions are generally less stable and should be prepared fresh when possible.
Legality depends on the country and the intended use. It is not an approved medicine, and some places restrict or ban sales for human consumption. Buyers should verify local rules and product documentation before procurement.
It is a synthetic REV-ERB agonist used mainly in preclinical research. It is not an approved medicine for human use.