LC-MS/MS 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.
Updated 2026-04-06. Numbers and descriptions here follow the published literature rather than marketing material.
At the molecular level, SR9009 binds the ligand-binding domain of REV-ERB and strengthens recruitment of corepressor proteins such as NCoR and HDAC3. This increases repression of target genes, including Bmal1 and other clock-controlled and metabolic genes. In rodent studies, such changes have been linked to altered lipid handling, glucose metabolism, and energy expenditure. The precise chain of events between receptor binding and whole-body effects remains an active area of research. Findings in animals do not automatically translate to humans.
Laboratory studies often administer SR9009 by injection because oral absorption appears poor in rodents. Reported pharmacokinetic properties include rapid metabolism and low systemic exposure after oral dosing. Human pharmacokinetic data are sparse, so absorption, distribution, metabolism, and excretion in people are not well defined. Some research explores related REV-ERB compounds with improved drug-like properties. Regulatory approval for any REV-ERB agonist as a human medicine has not been granted to date.
Laboratory samples of SR9009 are typically supplied as a white to off-white powder. The compound dissolves readily in organic solvents such as dimethyl sulfoxide and ethanol, while its solubility in water is low. Because of this solubility profile, researchers often prepare concentrated stock solutions in an organic solvent before diluting them into aqueous assay buffers. Light exposure, moisture, and repeated freeze-thaw cycles can degrade many small molecules, so handling procedures usually aim to minimize these factors. Purity is commonly checked before use.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic small molecule | Studied as a REV-ERB agonist |
| Molecular formula | C20H24ClN3O4S | Reported for the neutral compound |
| Appearance | Off-white to pale yellow solid | Typical research-grade material |
| Solubility | Sparingly soluble in water | Soluble in solvents such as DMSO |
| Common synonyms | SR9009; Stenabolic | Stenabolic is an informal alias |
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.
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.
=== Havana oil refinery fire === A fire broke out at a key fuel processing plant on 13 February in Havana, exacerbating the energy crisis further since the executive order of Trump on 29 January, which imposed an oil blockade. A large plume of smoke was seen rising above Havana Bay from the Nico López refinery on Friday, drawing the attention of the capital's residents before fading as fire crews fought to bring the situation under control. Cuba's Ministry of Energy and Mines said the fire, which erupted in a warehouse at the refinery, was eventually extinguished and that "the cause is under investigation". There were no injuries and the fire did not spread to nearby areas, the ministry said in a post on social media. The ministry said the workday at the Nico Lopez Refinery "continues with complete normalcy". The location of the fire was close to where two oil tankers were moored in Havana's harbour.
=== Other interventions === A 2024 review found that fecal microbiota transplantation may reduce pain intensity and improve fatigue and quality of life in patients with fibromyalgia, but evidence was insufficient at that stage to support use. Research on gut microbiome links with FM continues. Hyperbaric oxygen therapy (HBOT) has shown beneficial effects in treating chronic pain by reducing inflammation and oxidative stress. However, treating fibromyalgia with hyperbaric oxygen therapy is still controversial, in light of the scarcity of large-scale clinical trials. In addition, hyperbaric oxygen therapy raises safety concerns due to the oxidative damage that may follow it. An evaluation of nine trials with 288 patients in total found that HBOT was more effective at relieving fibromyalgia patients' pain than the control intervention. In most of the trials, HBOT improved sleep disturbance, multidimensional function, patient satisfaction, and tender spots. Negative outcomes (predominantly mild barotrauma (air pressure effect on ear or lung) that could be resolved spontaneously) were experienced by 24% of the patients, but they were not prevented from completing the treatment regimen, and no serious side effects, complications, or deaths were reported.
== External links == Countercurrent multiplier animation from Colorado University. Research about elephant seals using countercurrent heat exchange to keep heat from leaving their body while breathing out, during hibernation. Patent for a snow mask with a removable countercurrent exchange module which keeps the warmth from leaving the mask when breathing out.
Sources: en.wikipedia.org
== Etymology and naming == The genus name Lycium was assigned by Linnaeus in 1753. The Latin name lycium is derived from the Greek word λύκιον (lykion), used by Pliny the Elder (23–79) and Pedanius Dioscorides (ca. 40–90) for a plant known as dyer's buckthorn, which was probably a Rhamnus species. The Greek word refers to the ancient region of Lycia (Λυκία) in Anatolia, where that plant grew. The common English name, wolfberry, has an unknown origin. It may have arisen from the mistaken assumption that the Latin name Lycium was derived from Greek λύκος (lycos), meaning "wolf". In the English-speaking world, the name goji berry has been used since around 2000. The word goji is an approximation of the pronunciation of 枸杞 (pinyin: gǒuqǐ), the name for the berry-producing plant Lycium chinense in several Chinese dialects. In Japanese, 枸杞 is written and pronounced クコ (kuko). In technical botanical nomenclature, Lycium barbarum is called matrimony vine, while Lycium chinense is Chinese desert-thorn. In the United States, various common names are used for Lycium species and varieties, such as desert-thorn, boxthorn, matrimony vine, and wolfberry.
== Symptoms == Cats will generally show a gradual onset of the disease over a few weeks or months, and it may escape notice for even longer. The first outward symptoms are sudden weight loss (or occasionally gain) accompanied by polydipsia and polyuria. Polyphagia or anorexia may be observed. Neuropathy in the hind legs may cause the cat to develop a plantigrade stance, walking on its hocks rather than its toes. The front legs may develop a corresponding palmigrade stance, with the cat standing on its "palms" rather than its toes. A fasting glucose blood test will normally be suggestive of diabetes at this point. The same home blood test monitors used in humans are also used on cats, usually by obtaining blood from the ear edges or paw pads. As the disease progresses, ketone bodies will be present in the urine, which can be detected with the same urine strips used for testing human urine. In the final stages, the cat starts wasting, with the body breaking down its own fat and muscle to survive. Lethargy/limpness and acetone-smelling breath are acute symptoms of ketoacidosis and/or dehydration and constitute a medical emergency. Untreated, diabetes leads to coma and then death.
where R is the ratio of the actual area of the surface to the observed area of a surface and θ is the Young's contact angle as defined for an ideal surface. See Wetting. Based on the physical modification of the surface, an antiviral surface can be designed by decorating micropillars on the surface.
== Usage and maintenance == Vehicles traveling on ice roads include ordinary automobiles and trucks of various sizes and weights. Standard winter tires are sufficient: in fact cleats and tire chains can damage the road surface. Tire chains may be stored in the vehicle for emergency purposes; they can also come in handy when traveling on a winter road with grades steeper than 8% on over-land segments. Signage may indicate speed limits, for instance a maximum of 25 km/h (16 mph), and spacing between vehicles, for instance 500 m (1,600 ft) for loads more than 12,500 kg (27,600 lb). These restrictions are to decrease the risks of damage to the ice cover, which would compromise its ability to support the weight it has been designed for. Maintenance comprises two main tasks:
Sources: en.wikipedia.org
SR9009 is a synthetic research compound that activates the REV-ERBα and REV-ERBβ nuclear receptors. It is not an approved drug and has no established human therapeutic use. Most published biological data come from cell and rodent studies.
No. SR9009 is frequently mislabeled as a SARM in online discussions, but it does not target androgen receptors. Its known mechanism involves REV-ERB nuclear receptors and circadian-metabolic gene regulation.
Human clinical data are very limited. There is no approved human use, and safety and efficacy in people are not established. Most evidence comes from preclinical models, so effects observed in animals may not apply to humans.
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.