The short version of analytical standard fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-01-23. Anything still debated is marked as such rather than presented as settled.
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.
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 |
|---|---|---|
| Appearance | White to off-white solid | Visual inspection is not sufficient for identity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water. |
| Typical storage | -20 °C, desiccated, dark | Protect from repeated temperature changes. |
| Common analytical method | LC-MS or HPLC-UV | Reference standard required for comparison. |
| Common synonyms | SR9009; Stenabolic; REV-ERB agonist | Vendor naming may vary. |
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.
Analytical chemists detect SR9009 with liquid chromatography-tandem mass spectrometry, commonly abbreviated LC-MS/MS. Sample preparation may involve protein precipitation, liquid-liquid extraction, or solid-phase extraction before analysis. Laboratories can target the parent compound or its metabolites, depending on the matrix and the purpose of testing. Anti-doping methods require sensitive and specific assays because concentrations in biological samples can be low. Reference standards and validated methods are essential for reliable identification and quantification.
Regulatory agencies have not approved SR9009 for human therapeutic use. It is typically sold as a research chemical with labels stating that it is not for human consumption. The World Anti-Doping Agency prohibits the substance in sport, generally under the category of non-approved substances. Customs and national laws may restrict importation, sale, or possession. Product quality and legal status can vary by country and vendor, and therapeutic claims are not permitted in regulated advertising because the compound lacks approval.
Several misconceptions surround SR9009. It is often described as a SARM, a steroid, or an exercise pill, but its known target is the REV-ERB receptor family. Rodent studies have examined exercise capacity and metabolic markers, yet human outcomes remain unproven. Oral bioavailability appears low in animals, and human pharmacokinetics are not well characterized. Online products may contain impurities or different compounds, so identity and purity testing are important for research use.
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.
== Personal life == Schumer dated professional wrestler Nic Nemeth, known by his ring name Dolph Ziggler, and comedian Anthony Jeselnik. She dated Ben Hanisch from 2015 to 2017. In early 2017, Schumer adopted a black dog named "Tati", after Tatiana Maslany. On February 13, 2018, Schumer married chef and farmer Chris Fischer in Malibu, California. In 2019, Schumer gave birth to their son via caesarean section due to her endometriosis. In September 2021, Schumer had her uterus removed to alleviate symptoms related to the condition. In February 2024, she announced that she had been diagnosed with Cushing's syndrome. Schumer announced her separation from Fischer on December 12, 2025. Schumer and Fischer divorced in September of 2026. In 2026, Schumer spoke publicly about her weight-loss journey, saying she had turned to the medication Mounjaro (tirzepatide) after previously discontinuing Ozempic and Wegovy because a GDF15 gene variant left her severely nauseated.
Manipulation of norepinephrine suggests it may actually play a role in creating a feeling of fatigue. Reboxetine, an NRI, decreased time to fatigue and increased subjective feelings of fatigue. This may be explained by a paradoxical decrease in adrenergic activity led by feedback mechanisms.
CI mass spectrometry is a useful tool in structure elucidation of organic compounds. This is possible with CI, because formation of [M+1]+ eliminates a stable molecule, which can be used to guess the functional groups present. Besides that, CI facilitates the ability to detect the molecular ion peak, due to less extensive fragmentation. Chemical ionization can also be used to identify and quantify an analyte present in a sample, by coupling chromatographic separation techniques to CI such as gas chromatography (GC), high performance liquid chromatography (HPLC) and capillary electrophoresis (CE). This allows selective ionization of an analyte from a mixture of compounds, where accurate and precised results can be obtained.
=== Myopathies with central nuclei === Myopathies with central nuclei, such as myotubular myopathy, involves an error in the gene involved in vesicle movement throughout the cell. This creates problems in vesicles reaching the plasma membrane with the cellular components necessary to fuse myoblast, a major step in the formation of the skeletal muscle. This creates structural problems throughout the skeletal muscle and in the Z line of the sarcomere, creating the weakness in the muscle.
Sources: en.wikipedia.org
==== Tax Reform ==== For the first time since the redemocratization in Brazil (over 30 years ago), a tax reform was approved in congress; among its main points is the exemption from taxes for basic food products, as well as the creation of the VAT (Value Added Tax) and the "selective tax", (or "sin tax", a tax on items considered harmful to public health and the environment). Medicine, vegetables, medical devices, among other goods, will also be exempt from VAT charges, while other products such as speedboats, jets and yachts will become susceptible to IPVA charges. The reform also creates progressive taxation on inheritances, which received mild criticism from some sectors of the society. The National Congress enacted the reform on 20 December 2023, in a solemn session attended by the three heads of the republic's powers (executive, legislative and judiciary), as well as ministers Fernando Haddad, from the finance ministry, and Simone Tebet, from the planning ministry; Senate President Rodrigo Pacheco described the promulgation of the reform as "not only a historic milestone, but also a turning point" and claimed that this would "change Brazil's trajectory". After the approval of the reform, the risk rating agency S&P Global Ratings raised Brazil's credit rating and highlighted "better prospects for economic growth".
== Conjugation with other proteins or peptides == ubiquitination, the covalent linkage to the protein ubiquitin. SUMOylation, the covalent linkage to the SUMO protein (small ubiquitin-related modifier) neddylation, the covalent linkage to the Nedd protein ISGylation, the covalent linkage to the ISG15 protein (interferon-stimulated gene 15) pupylation, the covalent linkage to the prokaryotic ubiquitin-like protein
In 1874 Jacobus Henricus van 't Hoff and Joseph Le Bel independently proposed the tetrahedral arrangement of the atoms bound to carbon in organic molecules. Van't Hoff's theory validated and explained Pasteur's results with tartrate crystals, and Johannes Wislicenus' work with isomeric lactic acids, and was fundamental to the further development of stereochemistry. Until the use of X-rays there was no way to determine the actual crystal structure of even the simplest substances such as salt (NaCl). For example in the 1880s, William Barlow proposed several crystal structures based on close-packing of spheres some of which were validated later by X-ray crystallography; however, the available data were too scarce in the 1880s to accept his models as conclusive. In the period between the discovery of X-rays (1895) and X-ray diffraction (1912) Barlow and William Jackson Pope developed the principles of packing, and showed how to deduce the structures of some simple compounds. In the 1930s Linus Pauling was impressed that Barlow had assigned many crystal structures of metals (copper, silver, and gold to cubic close packing, and magnesium, zinc, and cadmium to hexagonal close packing) and salts (sodium, potassium and caesium chlorides) which were subsequently proved to be correct by X-ray crystallography. William Johnson Sollas emphasised the importance of different atomic sizes in constructing simple crystals, and correctly concluded that the sodium and chlorine atoms in salt would be of different sizes.
Sources: en.wikipedia.org
==== TCR β-chain selection ==== At the DN2 stage (CD44+CD25+), cells upregulate the recombination genes RAG1 and RAG2 and re-arrange the TCRβ locus, combining V-D-J recombination and constant region genes in an attempt to create a functional TCRβ chain. As the developing thymocyte progresses through to the DN3 stage (CD44−CD25+), the thymocyte expresses an invariant α-chain called pre-Tα alongside the TCRβ gene. If the rearranged β-chain successfully pairs with the invariant α-chain, signals are produced which cease rearrangement of the β-chain (and silence the alternate allele). Although these signals require the pre-TCR at the cell surface, they are independent of ligand binding to the pre-TCR. If the chains successfully pair a pre-TCR forms, and the cell downregulates CD25 and is termed a DN4 cell (CD25−CD44−). These cells then undergo a round of proliferation, and begin to re-arrange the TCRα locus during the double-positive stage.
given a Literature prize from the city of Zurich, 1932 made Titular Professor of the Swiss Federal Institute of Technology in Zurich, ETH 1935 appointed Honorary Member of the Royal Society of Medicine 1939 given a Festschrift at Eranos 1945 appointed President of the Society of Analytical Psychology, London, 1946 given a Festschrift by students and friends in 1955 named Honorary citizen of Küsnacht 1960, on his 85th birthday
=== Design === Some teams are developing interoperable solutions, but this is not common. Governments express concerns over data sovereignty. WHO established a "working group focused on establishing standards for a common architecture for a digital smart vaccination certificate to support vaccine(s) against COVID-19 and other immunizations". The COVID-19 Credentials Initiative hosted by Linux Foundation Public Health (LFPH) is a global initiative working to develop and deploy privacy-preserving, tamper-evident and verifiable credential certification projects based on the open standard Verifiable Credentials (VCs).
Sources: en.wikipedia.org
Liquid chromatography–mass spectrometry is common for identity and purity checks. High-performance liquid chromatography with ultraviolet detection can also be used. Both methods require a suitable reference standard.
The solid is usually kept desiccated at -20 °C or lower and protected from light. Stock solutions are aliquoted to limit freeze–thaw cycles. Aqueous solutions are not generally recommended for long-term storage.
Laws differ by country and by intended use. It is not an approved medicine, and many vendors sell it as a research chemical. Purchasers are responsible for confirming local restrictions.
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.