Everything below concerns circadian clock. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2025-12-24. 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.
SR9009 is generally described as poorly soluble in water and more soluble in organic solvents such as dimethyl sulfoxide and ethanol. Stock solutions are commonly prepared in an organic solvent before dilution into an aqueous buffer or vehicle. Precipitation can occur if the organic fraction is reduced too quickly or if the final concentration exceeds the compound's solubility limit. Sonication or gentle warming may aid dissolution in some protocols, but excessive heat can promote degradation. Container material and pH can also influence observed solubility.
For long-term storage, SR9009 is typically kept as a solid at low temperature, protected from moisture and light. Desiccated conditions limit hydrolysis, while opaque containers reduce photochemical breakdown. Solutions are less stable than solids and are often stored frozen in aliquots to avoid repeated freeze-thaw cycles. Stability data are not standardized across all suppliers, so users should rely on certificate-of-analysis information when available. Degradation may appear as color change, precipitate, or decreased chromatographic purity.
| 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 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.
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.
REV-ERB proteins typically suppress gene expression by recruiting corepressor complexes to DNA response elements. SR9009 binds these receptors and strengthens that repressive action in cell-based assays. Studies in rodents have reported changes in lipid handling, mitochondrial function, and exercise capacity after treatment. Such findings are often cited as evidence for metabolic effects, but species differences and limited pharmacokinetic data make direct translation to humans uncertain. Researchers continue to examine which effects are robust and which depend on specific experimental conditions.
SR9009 is frequently discussed alongside other REV-ERB ligands, including synthetic agonists and natural heme-related molecules. Its selectivity for REV-ERB over related nuclear receptors has been measured in binding and reporter assays, though off-target activity at higher concentrations is possible. The compound is prohibited in sport by the World Anti-Doping Agency, and it is not approved for any medical use in major jurisdictions. Products sold online may be labeled as research chemicals, and their identity and purity are not guaranteed by regulatory review.
The mechanism of action involves binding to REV-ERB receptors and recruiting corepressor complexes, which represses target gene transcription. This contrasts with many nuclear receptor agonists that activate transcription. Downstream effects may include changes in autophagy, mitochondrial biogenesis, and lipid handling, but the precise pathways remain an active area of study. Whether these molecular events translate into meaningful physiological effects in humans is unresolved. Most evidence comes from cultured cells and rodent models rather than human participants.
SR9009 is a synthetic small molecule developed as an agonist of the nuclear receptors REV-ERBα (NR1D1) and REV-ERBβ (NR1D2). These receptors help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, SR9009 alters transcription of genes involved in lipid metabolism, inflammation, and mitochondrial function. It is not an approved medicine, and its pharmacological profile in humans remains largely uncharacterized. The compound is frequently discussed in the context of circadian biology and metabolic research rather than clinical use.
=== Red peppercorns === Red peppercorns usually consist of ripe peppercorn drupes preserved in brine and vinegar. Ripe red peppercorns can also be dried using the same colour-preserving techniques used to produce green pepper.
Amy M. Barrios is an American medicinal chemist working as a professor of Medicinal Chemistry and the Associate Dean for Postdoctoral Affairs for the University of Utah. Barrios' research lab focuses on developing probes to study protein tyrosine phosphatase (PTP) activity and regulation.
=== Celeste Pacquet === Celeste Pacquet (Katrine De Candole) is a private wealth manager at Pierpoint. Yasmin meets her at a party hosted by her family friend Maxim Alonso, and Celeste plays along with Yasmin's assumption that she is a sex worker before eventually revealing her actual job. Yasmin, growing disgruntled with the FX desk, becomes increasingly drawn to working for PWM, in part due to her escalating flirtation with Celeste. Yasmin and Celeste eventually have sex, but Celeste reveals she is already in an open marriage with her wife and resents the power imbalance in their relationship, making Yasmin realize their affair is not as significant as she imagined. Yasmin brings in her father, Charles Hanani, as a PWM client, but soon regrets it after learning about his various affairs and subsequent NDA settlements, realizing he is a sexual predator. Celeste refuses to cut ties with Charles despite knowing about his inappropriate behavior firsthand, telling Yasmin that it is "better to work within a system and succeed than to wish for it to change and be left behind." A disillusioned Yasmin cuts ties with Celeste shortly thereafter.
== Human studies == Meso-zeaxanthin is a regular dietary component in countries where it is a major pigment used by the poultry industry, particularly in Mexico. Neither adverse nor positive effects have yet been reported. In addition, meso-zeaxanthin has been tested for efficacy, though not for safety, in small pilot studies in humans. The first study to evaluate the effects of a dietary supplement containing predominantly meso-zeaxanthin was conducted in 2007. This research confirmed that meso-zeaxanthin was effectively absorbed into the serum, and MP density was increased significantly in the supplementation group. No such increases were observed in the placebo group. In another study 19 subjects consumed a supplement composed of all three macular carotenoids, including meso-zeaxanthin, for 22 days. Results demonstrated that meso-zeaxanthin was absorbed. At the Institute of Vision Research, Waterford Institute of Technology, the Meso-zeaxanthin Ocular Supplementation Trials (MOST), have been conducted to evaluate safety, MP response, and serum carotenoid response in subjects with and without AMD, following consumption of a supplement containing all three macular carotenoids in which meso-zeaxanthin was predominant. These studies confirmed safety for human consumption of the macular carotenoids following many biological tests to assess renal and liver functions, lipid profile, hematologic profile, and markers of inflammation. Also, the MOST trials identified statistically significant increases in serum concentrations of meso-zeaxanthin and lutein from baseline.
Sources: en.wikipedia.org
== Investments == Mubadala has invested in logistics software startup Turvo, Alphabet-owned self-driving technology company Waymo, Reliance Jio Platforms, UK life sciences company Envision, and Telegram. Mubadala is a parent company of GlobalFoundries, a semiconductor foundry company. Mubadala owns stakes in numerous companies, including a 7.5 percent share in the Carlyle Group. In 2007 Mubadala announced an initial investment in AMD. As of 2017 Mubadala had a stake of 12.9 percent in the chipmaker. In 2019 Mubadala sold its entire stake in AMD. In 2019, Mubadala and Falcon Edge Capital established Abu Dhabi Catalyst Partners, a $1 billion joint venture to invest in financial institutions. In November 2020, Mubadala transferred ownership of two information technology companies it previously owned, Injazat and Khazna, to artificial intelligence company, G42, and took a stake in G42. In 2021, Mubadala purchased a 2.6% stake in En+ Group, a manufacturer of green aluminum, from Polina Yumasheva, the former wife of Russian businessman Oleg Deripaska. The same year, Mubadala purchased MetrôRio, the company that holds the operations for the Rio de Janeiro metro, from Invepar. In 2016, Mubadala became the biggest external shareholder at Investcorp, after acquiring 20% stakes in the Bahraini firm. In 2023, a former UK minister, Gerry Grimstone was criticized for conducting and not declaring 13 meetings with Mubadala and Khaldoon al-Mubarak, after acquiring the role as an adviser and the chair of planned climate fund at Investcorp.
=== Viral assembly === Genetically engineered M13 bacteriophage viruses allow preparation of quantum dot biocomposite structures. It had previously been shown that genetically engineered viruses can recognize specific semiconductor surfaces through the method of selection by combinatorial phage display. Additionally, it is known that liquid crystalline structures of wild-type viruses (Fd, M13, and TMV) are adjustable by controlling the solution concentrations, solution ionic strength, and the external magnetic field applied to the solutions. Consequently, the specific recognition properties of the virus can be used to organize inorganic nanocrystals, forming ordered arrays over the length scale defined by liquid crystal formation. Using this information, Lee et al. (2000) were able to create self-assembled, highly oriented, self-supporting films from a phage and ZnS precursor solution. This system allowed them to vary both the length of bacteriophage and the type of inorganic material through genetic modification and selection.
Anti-citrullinated protein antibodies (ACPAs) are autoantibodies (antibodies to an individual's own proteins) that are directed against peptides and proteins that are citrullinated. They are present in the majority of patients with rheumatoid arthritis. Clinically, cyclic citrullinated peptides (CCP) are frequently used to detect these antibodies in patient serum or plasma (then referred to as anti–citrullinated peptide antibodies). During inflammation, arginine amino acid residues can be enzymatically converted into citrulline residues in proteins such as vimentin, by a process called citrullination. If their shapes are significantly altered, the proteins may be seen as antigens by the immune system, thereby generating an immune response. ACPAs have proved to be powerful biomarkers that allow the diagnosis of rheumatoid arthritis (RA) to be made at a very early stage. In July 2010, the 2010 ACR/EULAR Rheumatoid Arthritis Classification Criteria were introduced. These new classification criteria include ACPA testing, and overruled the "old" ACR criteria of 1987 and are adapted for early RA diagnosis.
== Pharmacology == Pirepemat shows affinity for several neurotransmitter receptors and transporters. These include the serotonin 5-HT7 receptor (Ki = 980 nM), the sigma σ1 receptor (Ki = 1,200 nM), the serotonin transporter (SERT) (Ki = 2,500 nM), the α2C-adrenergic receptor (Ki = 3,800 nM), the α2A-adrenergic receptor (Ki = 6,500 nM), the serotonin 5-HT2C receptor (Ki = 6,600 nM), the serotonin 5-HT2A receptor (Ki = 8,100 nM), and the norepinephrine transporter (NET) (Ki = 8,100 nM). It also shows affinity for the rat κ-opioid receptor (KOR) (Ki = 6,500 nM) and has weak affinity for the α1-adrenergic receptor (Ki = 21,000 nM). The drug was an antagonist or inhibitor at all assessed targets (which included some but not all of the preceding sites). Pirepemat has been described as a "cortical enhancer" and has been reported to region-specifically increase norepinephrine, dopamine, and acetylcholine levels in the cerebral cortex. Serotonin 5-HT7 receptor antagonism and α2-adrenergic receptor antagonism were hypothesized to underlie these effects. In animals, pirepemat has been found to reverse hypoactivity induced by the dopamine depleting agent tetrabenazine whilst not increasing basal locomotor activity and not affecting or minimally influencing dextroamphetamine- and dizocilpine-induced locomotor hyperactivity.
There were some issues with this survey though. The NCVS produces only the annual estimates of victimization. The survey that Christi Guerrini, Jill Robinson, Devan Petersen, and Amy McGuire produced asked the participants about the incidents of victimization over one's lifetime. Their survey also did not restrict other family members to one household. Around 25% of people who responded to the survey said that they have had family members that have been employed by law enforcement which includes security guards and bailiffs. Throughout these surveys, it has been found that there is public support for law enforcement to access genetic genealogy databases.
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.
Liquid chromatography with mass spectrometry is a common approach. Ultraviolet detection and nuclear magnetic resonance can support identification when suitable standards are available.