Everything below concerns REV-ERB agonist. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-07-18. Numbers and descriptions here follow the published literature rather than marketing 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.
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.
Analytical identification and purity assessment often use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Liquid chromatography–tandem mass spectrometry is used to detect and quantify SR9009 in biological matrices, including urine and blood, for anti-doping or pharmacokinetic studies. Nuclear magnetic resonance spectroscopy can confirm molecular structure. Stability depends on form and storage: the solid is generally more stable than solutions, and repeated freeze–thaw cycles may degrade samples. Purity is typically reported as a percentage from a certificate of analysis.
Regulatory treatment of SR9009 varies by country and context. It is not approved as a therapeutic drug by agencies such as the United States Food and Drug Administration or the European Medicines Agency. Sports authorities list it as a prohibited substance; the World Anti-Doping Agency classifies it among hormone and metabolic modulators. Legal status for personal possession or sale differs across jurisdictions, and some countries may restrict it under analog or research chemical laws. Buyers who seek verified material often rely on independent laboratory testing because online product labels may not match contents.
Laboratory samples of SR9009 are typically handled as research chemicals rather than pharmaceuticals. Suppliers usually state that the material is for research use only and not for human or veterinary administration. Storage recommendations generally call for a freezer at approximately −20 °C, protection from light, and a desiccated environment. The solid is often described as a white to off-white powder. Solubility is commonly reported in organic solvents such as dimethyl sulfoxide and ethanol, with low solubility in water.
| 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 developed as a REV-ERB agonist. It binds to REV-ERBα and REV-ERBβ, nuclear receptors that help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, the compound alters lipid and glucose handling and influences skeletal muscle oxidative capacity. Its exact effects in humans remain largely uncharacterized because controlled clinical trials have not been reported. The molecule is frequently described in preclinical literature as a metabolic modulator.
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.
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.
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.
Rabeprazole is a novel benzimidazole compound on market, since 1999 in USA. It is similar to lansoprazole in having no substituents on its benzimidazole part and a methyl group at site 3 on the pyridine, the only difference is the methoxypropoxy substitution at site 4 instead of the trifluoroethoxy group on lansoprazole. Rabeprazole is marketed as rabeprazole sodium salt. It is available as enteric-coated tablets.
is the number of sequences. This can be viewed as estimating a separate rate parameter for every character × branch pair in the dataset (note that the number of branches in a fully resolved phylogenetic tree is
A formal order was given to not use the white flag so that the action would be considered a ceasefire instead of a surrender. Much of the fighting ended on May 7; however, the ceasefire was not respected on Isabelle, the isolated southern position, where the battle lasted until May 8, 1:00 am. At least 2,200 members of the 20,000-strong French forces died, and another 1,729 were reported missing after the battle, and 11,721 were captured. The Viet Minh suffered approximately 25,000 casualties over the course of the battle, with as many as 10,000 Viet Minh personnel having been killed in the battle. The French prisoners taken at Điện Biên Phủ were the greatest number the Việt Minh had ever captured: one-third of the total captured during the entire war. Dien Bien Phu was a serious defeat for the French and was the decisive battle of the Indochina war. The battle would thus heavily influence the outcome of the 1954 Geneva accords.
=== Prostaglandin endoperoxide 2 (PGE2) === Many other immunomodulating factors have been isolated, the most important of which are prostaglandins and cytokines. PGE2 was the first immunomodulator to be derived from macrophages and described. PGE2 functions in amplifying peripheral blood lymphocyte IL-10 transcription and protein production; as well as in deactivating macrophages and T-cells. PGE2 is an immunomodulatory eicosanoid derived from the cell membrane component, arachidonic acid, and is processed in the arachidonic acid cascade: the successive oxygenation and isomerization of arachidonic acid by cyclooxygenase and PGE2 synthase enzymes. The regulation of target cells by PGE2 occurs via signaling through four cell membrane-associated G-protein-coupled E-prostanoid (EP) receptors, named EP1, EP2, EP3, and EP4. PGE2 inhibits bacterial killing and ROI production by AM by impairing Fcγ-mediated phagocytosis through its ability to stimulate the production of intracellular cyclic adenosine monophosphate (cAMP) effectors via EP2 and EP4 receptors signaling. EP2 and EP4 receptors signal primarily through stimulatory G protein (Gs), increasing adenylyl cyclase (AC) activity and subsequent cAMP formation. cAMP is a second messenger that influences multiple cellular functions via the activation of two downstream effector molecules, protein kinase A (PKA) and the exchange proteins directly activated by cAMP (Epac-1 and -2). Epac-1 and PKA are both important factors involved in the inhibition of AM bacterial killing.
Sources: en.wikipedia.org
== Diagnosis == In addition to evaluating the symptoms above, the health care provider may find decreased or no blood pressure in the arm or leg. Tests to determine any underlying cause for thrombosis or embolism and to confirm presence of the obstruction may include:
The new 36th district encompasses parts of Southeast Texas, including the Harris County side of the Clear Lake region of Houston. While largely unchanged from its previous iteration, the new iteration includes Lufkin and the surrounding Piney Woods region as well as Silsbee, Jasper and most of Beaumont, and also extends to almost all of Chambers County (including Mont Belvieu) east of Houston) before extending into southeast Houston (including Hobby Airport and Ellington Field, as well as Glenbrook Valley and the aforementioned Clear Lake City development) along with the southeast Harris County communities of Seabrook, Webster and Harris County's portion of Friendswood, and a small sliver of northern Brazoria County centered on most of Pearland. The incumbent is Republican Brian Babin, who was re-elected with 69.4% of the vote in 2024. Donald Trump won 61.8% of the vote in the new district in 2024, as did Ted Cruz with 59.1% of the vote.
== Role of macrophages == The primary role of macrophages in peripheral regeneration is demylenation during Wallerian degeneration. Immunohistochemical analysis showed that in tellurium demylenated, crushed, and cut nerves, expression of lysozyme, which is a marker for myelin phagocytosis, and of ED1, which is a marker for macrophages, occurred in the same region. Lysozyme was also investigated with respect to the temporal progression of myelin phagocytosis by macrophages in nerve injury. Northern blotting showed that peak lysozyme mRNA expression occurred at an appropriate time with respect to temporal models of myelin phagocytosis. Macrophages do not phagocytose all cellular debris at the nerve injury site; they are selective and will salvage certain factors. Macrophages produce apolipoprotein E which is involved in rescuing cholesterol in damaged nerves. In the same investigation, temporal levels of apolipoprotein E mRNA expression in the three models for demylenation and nerve damage were consistent with respect to models for cholesterol salvage in nerve injury. Macrophages play a role in salvaging cholesterol during nerve injury. Macrophages also play a role in inducing the proliferation of Schwann cells that occurs during Wallerian degeneration. Supernatant has been collected from medium in which macrophages are active in myelin phagocytosis where lysosomal processing of the myelin occurs within the macrophage.
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.
Legality depends on the country and the intended use. In many places it is sold as a research chemical, but sports and medicine regulations restrict it.