The short version of circadian clock fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-01-20 and is reviewed periodically as new material appears.
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.
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.
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 |
|---|---|---|
| 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 |
SR9009 binds REV-ERB receptors and alters their repressive activity on target genes. This action can change transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. In rodent studies, treated animals have shown changes in muscle oxidative capacity and exercise performance, though effects vary by dose, duration, and model. The precise molecular steps connecting receptor binding to whole-body outcomes are still an active area of investigation. Findings in animals do not automatically translate to humans.
Because REV-ERB receptors are core clock components, SR9009 has been examined for effects on daily rhythms as well as metabolism. Research has explored whether the compound can shift or reinforce circadian gene expression in tissues such as liver and muscle. Some studies report improved metabolic markers in obese or diabetic mice, while others show context-dependent responses. Questions remain about which effects are direct, which are secondary to timing, and how they might differ across species.
SR9009 is a synthetic small molecule studied as an agonist of REV-ERB nuclear receptors. REV-ERB alpha and REV-ERB beta help regulate circadian rhythms and metabolic gene expression. In laboratory research, SR9009 has been used to probe how these receptors affect skeletal muscle, liver, and adipose tissue. The compound was identified in academic drug-discovery work and is often described in scientific literature by its chemical name and research code. It is not an approved medicine, and human clinical data remain limited or absent.
Most published work on SR9009 consists of preclinical studies. It is widely sold as a research chemical, a category that does not imply safety, efficacy, or pharmaceutical-grade quality. Sports anti-doping organizations have listed SR9009 as a prohibited substance, and its presence in an athlete sample can lead to sanctions. Legal status differs by country; in several jurisdictions it is not approved for human consumption and may be treated as an unapproved new drug.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not a steroid, peptide, or natural hormone. In scientific literature, it appears under the code SR9009 and in non-scientific contexts as Stenabolic. The compound was identified through chemical screening efforts aimed at targeting circadian clock components. Its status remains investigational, and no regulatory agency has approved it as a human medicine.
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.
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.
Research interest in SR9009 grew from studies of circadian biology and metabolic disease. Preclinical reports describe effects on exercise capacity, muscle metabolism, and blood lipid levels in rodents, but these findings come from controlled laboratory settings. The compound has low oral bioavailability in animals, which limits systemic exposure after swallowing. Investigators often use injected routes in experiments to achieve measurable plasma concentrations. Human clinical data are sparse, no approved therapeutic product exists, and whether animal effects translate to humans remains an open question.
In any case, suvorexant is a controlled substance in the United States due to concerns about the possibility of misuse. Besides its subjective side effects, suvorexant has been found to cause dose-dependent increases in serum cholesterol levels in clinical trials. These changes in cholesterol levels were +1.2 mg/dL at 10 mg, +2.3 mg/dL at 20 mg, +3.1 mg/dL at 40 mg, and +6.0 mg/dL at 80 mg relative to –3.7 mg/dL for placebo. Although the increases in cholesterol levels with approved doses of suvorexant (10–20 mg) are small, they could be important over a long duration of treatment. Early studies in rodents found that orexins (derived from Greek "orexis" meaning "appetite") stimulate appetite, feeding behavior, and weight gain while orexin receptor antagonists block these effects. However, subsequent animal studies were more mixed, with the effects being limited and depending on the animal strain. In humans, orexin receptor antagonists including suvorexant have not been found to affect body weight in rigorous clinical trials that lasted up to 12 to 14 months.
The tissue is then prepared for viewing under a microscope using either chemical fixation or frozen section. If a large sample is provided e.g. from a surgical procedure then a pathologist looks at the tissue sample and selects the part most likely to yield a useful and accurate diagnosis - this part is removed for examination in a process commonly known as grossing or cut up. Larger samples are cut to correctly situate their anatomical structures in the cassette. Certain specimens (especially biopsies) can undergo agar pre-embedding to assure correct tissue orientation in cassette & then in the block & then on the diagnostic microscopy slide. This is then placed into a plastic cassette for most of the rest of the process.
== Properties == Protolichesterinic acid is a member of the class of chemicals known as lactone fatty acids, a group that includes lichesterinic acid, alloprotolichesterinic acid, nephromopsinic acid, and nephrosterinic acid. In its purified form, protolichesterinic acid is a crystalline solid that forms lustrous plates when recrystallized from benzene or acetic acid at temperatures below 50 °C (122 °F). It has a melting point of 107.5 °C (225.5 °F). The compound exists in both enantiomeric forms, with the (+)-enantiomer showing an optical rotation of [α]D +12° in chloroform and the (-)-enantiomer showing [α]D -12° in chloroform. In ultraviolet–visible spectroscopy, it shows maximum absorption at 218 nm in methanol. Its infrared spectrum (KBr) shows characteristic peaks including those corresponding to carboxylic acid (3450 cm−1), alkene (3050 cm−1), and carbonyl (1720 cm−1) functionalities. Nuclear magnetic resonance spectroscopy confirms its structure, with distinctive signals in the 1H NMR spectrum including the terminal methyl group at δ 0.68 ppm and alkene protons at δ 6.03 and 6.39 ppm. The 13C NMR spectrum shows key resonances for the carboxylic acid (174.4 ppm), alkene (132.6 and 125.9 ppm), and lactone carbonyl (168.2 ppm) carbons.
Alfonso Vidal also said that at his final meeting with Agent Poll, Poll told him that he could manipulate the public into believing anything, and even convince the country that Alfonso Vidal was a thief, as "...money can go missing anytime." Alfonso Vidal also stated that he firmly believed that Grand Treasurer Airán Cervera was either in the employment of the Ministry of the Interior or the National Revolutionary Police Force. He said that Grand Treasurer Airán Cervera could not be trusted.
Injury in animals is sometimes defined as mechanical damage to an anatomical structure, but it has a wider connotation of physical damage with any cause, including drowning, burns, and poisoning. Such damage may result from attempted predation, territorial fights, falls, and abiotic factors. Injury triggers an inflammatory response in animals of many different phyla. This prompts coagulation of the blood or body fluid, followed by wound healing, which may be rapid, as in cnidarians. Arthropods are able to repair injuries to the cuticle that forms their exoskeleton to some extent. Animals in several phyla, including annelids, arthropods, cnidarians, molluscs, nematodes, and vertebrates, are able to produce antimicrobial peptides to fight off infection following an injury.
Sources: en.wikipedia.org
== Pharmacokinetics == Absorption: Once consumed, cefuroxime axetil is converted to the active compound cefuroxime by esterases of mucosal cells in the gastrointestinal tract. Cefuroxime is then released for systematic circulation. If cefuroxime axetil is given with food, absorption values can increase from 37% in fasting patients to 52% in fed patients. Distribution: It has been reported that after cefuroxime axetil administration, it can be found in tonsil tissue, sinus tissue, bronchial tissue and middle ear effusion. Elimination: After cefuroxime production, the body is unable to metabolize the drug, and is eliminated unchanged in the urine.
=== Organelles === It is believed, on the basis of study of the genomes of different lineages of modern eukaryotes, to have been a single cell with a nucleus, at least one centriole and cilium, facultatively aerobic mitochondria, sex (meiosis and syngamy), a dormant cyst with a cell wall of chitin or cellulose, and peroxisomes. All of these features are unique to the eukaryotes. Some modern eukaryotes such as myxomycetes are syncitial, with multiple nuclei: this has been suggested as a feature of the LECA. It has been proposed that the LECA fed by phagocytosis, engulfing other organisms, though this has been disputed. The LECA has been described as having "spectacular cellular complexity". Its cell was divided into compartments such as the Golgi apparatus, the endoplasmic reticulum, and the nuclear envelope. It appears to have inherited a set of endosomal sorting complex proteins that enable membranes to be remodelled, including pinching off vesicles to form endosomes.
A 2017 study finds that countries' coup-proofing strategies are heavily influenced by other countries with similar histories. Coup-proofing is more likely in former French colonies. A 2018 study in the Journal of Peace Research found that leaders who survive coup attempts and respond by purging known and potential rivals are likely to have longer tenures as leaders. A 2019 study in Conflict Management and Peace Science found that personalist dictatorships are more likely to take coup-proofing measures than other authoritarian regimes; the authors argue that this is because "personalists are characterized by weak institutions and narrow support bases, a lack of unifying ideologies and informal links to the ruler". In their 2022 book Revolution and Dictatorship: The Violent Origins of Durable Authoritarianism, political scientists Steven Levitsky and Lucan Way found that political-military fusion, where the ruling party is highly interlinked with the military and created the administrative structures of the military from its inception, is extremely effective at preventing military coups. For example, the People's Liberation Army was created by the Chinese Communist Party during the Chinese Civil War, and never instigated a military coup even after large-scale policy failures (i.e. the Great Leap Forward) or the extreme political instability of the Cultural Revolution. Some scholars have posited that the recruitment of foreign legionnaires into national armies can reduce the probability of military coups.
=== Phase 1 === ABL-301 (SAR-446159) – bispecific antibody against α-synuclein [72] ALS-205 (PMX-205) – complement C5a receptor antagonist [73] ALX-001 (BMS-984923) – metabotropic glutamate mGlu5 receptor silent allosteric modulator [74] ARV-102 – leucine-rich repeat kinase 2 (LRRK2) inhibitor [75] ATH-399A (DWP-307399; HL-192) – nuclear receptor subfamily 4 group A member 2 (NR4A2) agonist [76] CT-2500 – undefined mechanism of action [77] FB-418 – Bcr-Abl tyrosine kinase inhibitor and leucine-rich repeat kinase 2 (LRRK2) inhibitor [78] GT-02287 – β-glucocerebrosidase (GCase) activator and/or chaperone [79] HL-400 – NLR family pyrin domain containing 3 (NLRP3) inhibitor [80] HNC-364 (rasagiline prodrug) – monoamine oxidase B (MAO-B) inhibitor [81] Human amniotic epithelial cell therapy - Shanghai iCELL Biotechnology (hAECs; hAESCs) – cell replacement [82] JNJ-0376 – undefined mechanism of action [83] JX-2105 – undefined mechanism of action [84] Lu AF28996 (Lu AF-28996) – dopamine D1 and D2 receptor agonist [85] LY-3962681 – RNA interference and α-synuclein expression modulator [86] MEDI-1341 (TAK-341) – monoclonal antibody against α-synuclein [87] NEU-723 – leucine-rich repeat kinase 2 (LRRK2) inhibitor [88] NN-9001 – undefined mechanism of action [89] PK-081 – α-synuclein degrader [90] Selnoflast (NLRP3i; RG-6418; RO-7486967; Somalix) – NLR family pyrin domain containing 3 (NLRP3) inhibitor inhibitor [91] TRN-501 – undefined mechanism of action [92] VQ-101 – glucosylceramidase stimulant [93] WID-2301 – undefined mechanism of action [94] WIT-2001 – undefined mechanism of action [95]
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.
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.