If you have been reading about research chemical and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Updated 2026-03-01. Numbers and descriptions here follow the published literature rather than marketing material.
Regulatory and sporting contexts treat SR9009 as a prohibited substance in many elite competitions. Its presence on banned lists reflects concerns about performance enhancement and unknown long-term safety. Analytical chemists have developed methods to detect the parent compound and its metabolites in urine and blood. Literature discussions distinguish between in vitro potency, animal pharmacology, and anecdotal human reports. The latter are difficult to verify because products sold online may lack purity or contain different compounds.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Binds REV-ERBα and REV-ERBβ in preclinical models |
| Molecular formula | C20H24ClN3O4S | Reported for the parent compound |
| CAS Registry Number | 1379686-30-2 | Common identifier in chemical databases |
| Appearance | Off-white to pale yellow solid | Typical research chemical solid |
| Solubility | Soluble in DMSO and ethanol; low in water | Class: small organic molecule |
Scientific discussion of SR9009 often separates animal evidence from human anecdote. Rodent studies provide controlled data on endurance, metabolism, and gene expression, but they use specific strains, doses, and treatment durations. Human reports are mostly uncontrolled and cannot establish cause and effect. Open questions include oral bioavailability, tissue distribution, metabolic stability, and long-term effects. Review articles generally call for more rigorous pharmacokinetic and safety research before any clinical use could be considered.
Analytical methods for SR9009 typically rely on liquid chromatography coupled with tandem mass spectrometry. The technique can separate the parent compound from related substances and detect low concentrations in biological matrices. Urine and blood are common samples in anti-doping testing, while in vitro studies may use cell culture media. Rapid metabolism and low expected concentrations make method validation important for reliable identification. Exact metabolite patterns can vary by species and are not fully mapped.
==== Dispersive liquid–liquid microextraction (dLLME) ==== Dispersive liquid-liquid microextraction is process used to extract organic compounds from water samples, typically at a smaller scale than LLE using a separatory funnel. In this process, an extraction solvent immiscible with water is mixed with a dispersive solvent. The mixture is injected into the aqueous sample to be extracted, forming a dispersion of small organic droplets in the aqueous sample. The resulting suspension is then centrifuged to coalesce the organic droplets and separate the organic and aqueous layers. The organic phase can then be removed using a microsyringe or other tool. Chlorinated solvents are commonly used as the extractive solvent as their higher density makes them settle to the bottom of centrifuge tubes. Acetone is a common dispersive solvent. dLLME is favored for its relatively low use of organic solvent for a batch extraction process which can reduce costs. The lower solvent usage means dLLME can be considered a "green chemistry" process though common use of chlorinated solvents as the organic phase is typically considered antithetical to green chemistry principles. This process is useful in extraction organic compounds such as organochloride and organophosphorus pesticides, as well as substituted benzene compounds from water samples.
===== Kidnapping of Jesús Alfredo Guzmán Salazar and Iván Archivaldo Guzmán ===== In August 2016 in an upmarket restaurant called La Leche in the resort city of Puerto Vallarta, the CJNG kidnapped two sons of Joaquin Guzmán Loera (El Chapo), Jesús Alfredo Guzmán Salazar and Iván Archivaldo Guzmán Salazar, along with friends and then released them after negotiations. The event happened shortly after the incarceration of Joaquín Guzmán and was seen as a humiliation for the powerful Sinaloa cartel.
Pharmacometabolomics, also known as pharmacometabonomics, is a field which stems from metabolomics, the quantification and analysis of metabolites produced by the body. It refers to the direct measurement of metabolites in an individual's bodily fluids, in order to predict or evaluate the metabolism of pharmaceutical compounds, and to better understand the pharmacokinetic profile of a drug. Alternatively, pharmacometabolomics can be applied to measure metabolite levels following the administration of a pharmaceutical compound, in order to monitor the effects of the compound on certain metabolic pathways(pharmacodynamics). This provides detailed mapping of drug effects on metabolism and the pathways that are implicated in mechanism of variation of response to treatment. In addition, the metabolic profile of an individual at baseline (metabotype) provides information about how individuals respond to treatment and highlights heterogeneity within a disease state. All three approaches require the quantification of metabolites found in bodily fluids and tissue, such as blood or urine, and can be used in the assessment of pharmaceutical treatment options for numerous disease states.
==== Numerical solutions to the SIR model with approximations ==== Numerical solutions to the SIR model can be found in the literature. An example is using the model to analyze COVID-19 spreading data. Three reproduction numbers can be pulled out from the data analyzed with numerical approximation,
Sources: en.wikipedia.org
== X == X-chromosome inactivation A process in female mammals where one of the two X chromosomes is randomly silenced in each cell to balance gene dosage with males. Some neurological disorders, such as Rett syndrome, are influenced by X-inactivation patterns. X-linked adrenoleukodystrophy A genetic disorder affecting the breakdown of very-long-chain fatty acids, leading to their accumulation in the brain and adrenal glands. It causes progressive demyelination and adrenal insufficiency. X-linked intellectual disability A group of inherited cognitive disorders associated with mutations on the X chromosome. Examples include Fragile X syndrome and MECP2 duplication syndrome. Xenon (anesthetic) A noble gas with neuroprotective and anesthetic properties. It has been studied for its NMDA receptor antagonism and minimal side effects on brain function. Xenotransplantation The transplantation of cells or tissues from one species to another for research or therapeutic purposes. In neuroscience, fetal pig or rat neural cells may be studied in primate models to investigate brain repair. Xerostomia A condition of dry mouth that may result from neurological disorders affecting autonomic control of salivary glands, such as Parkinson's disease or side effects of anticholinergic drugs.
14 August – The annual Government Expenditure and Revenue Scotland report shows a public spending deficit of £22.7bn for Scotland during 2023, an increase of £3.6bn from the previous year. The Scottish Government confirms it will follow the UK government by scrapping universal winter fuel payments for pensioners, with the benefit to be means tested. Staff working on Edinburgh's tram network vote to take strike action over a lack of toilet breaks. 15 August – A shipwreck, believed to be that of HMS Hawke, which was sunk by a torpedo during World War I, has been found off the Aberdeenshire coast. 16 August – 2024 Scottish Conservatives leadership election: Four of the six candidates running for the position of Scottish Conservative leader call for the race to be paused after claims about Douglas Ross's behaviour as leader. The claims concern a report that in July 2023 Ross had asked for the leader of Moray council, Kathleen Robertson, to stand down as the prospective parliamentary candidate for Moray West, Nairn and Strathspey. Meghan Gallacher resigns as the party's deputy leader, citing a "potential risk to the reputation of our party and the leadership contest" after reports that Ross had previously suggested Russell Findlay should succeed him. Developers working on HM Prison Highland in Inverness have uncovered a prehistoric settlement believed to be around 2,000 years old.
When women reach menopause and the estrogen produced by the ovaries declines, fat migrates from the buttocks, hips and thighs to the waist; later fat is stored in the abdomen. Visceral fat can be caused by excess cortisol levels. At least 10 MET-hours per week of aerobic exercise leads to visceral fat reduction in those without metabolic-related disorders. Resistance training and caloric restriction also reduce visceral fat, although their effect may not be cumulative. Both exercise and hypocaloric diet cause loss of visceral fat, but exercise has a larger effect on visceral fat versus total fat. High-intensity exercise is one way to effectively reduce total abdominal fat. An energy-restricted diet combined with exercise will reduce total body fat and the ratio of visceral adipose tissue to subcutaneous adipose tissue, suggesting a preferential mobilization for visceral fat over subcutaneous fat.
== Diagnosis == GAMT deficiency can be suspected from clinical findings, although clinical findings are not suggestive of a specific diagnosis. The initial diagnosis is typically established via measurement of creatine, creatinine, and guanidinoacetate in plasma, cerebrospinal fluid, or dried blood spots. These measurements can distinguish among the different cerebral creatine deficiency disorders. In GAMT deficiency, laboratory testing of plasma will show decreased levels of creatine and increased levels of guanidinoacetate. A definitive diagnosis requires DNA sequencing of the GAMT gene and/or GAMT enzymatic activity assays. Brain magnetic resonance spectroscopy can also be used in diagnosis, and will show decreased levels of creatine in affected individuals. However, as this finding is seen in all three cerebral creatine deficiencies, further testing is needed to identify the specific defect. Treatment is most effective for GAMT deficiency with early diagnosis; however, the non-specific clinical findings mean a diagnosis is often delayed. Due to the efficacy of early treatment and the lengthy typical diagnostic journey, GAMT deficiency has been recommended for newborn screening by the United States Advisory Committee on Heritable Disorders in Newborns and Children. Newborn screening assays measure the amount of guanidinoacetate in a dried blood spot using tandem mass spectrometry. Abnormal results from a newborn screening test still need to be confirmed by testing in plasma or urine.
=== Availability === Gonadorelin is available widely throughout the world for veterinary use, including in the United States, Canada, the United Kingdom, Ireland, elsewhere throughout Europe, South Africa, Australia, New Zealand, Japan, Taiwan. However, gonadorelin is not available for clinical use in humans in the United States.
Sources: en.wikipedia.org
SR9009 is a synthetic small molecule studied as an agonist of the REV-ERB nuclear receptors. It is not an approved medicine, and its effects in humans are not well characterized.
No. It is a synthetic ligand that binds nuclear receptors, not a steroid or peptide hormone. Its activity depends on receptor binding rather than endocrine secretion.
Clinical evidence is limited. Most published data come from cell and animal experiments. Human safety and efficacy remain uncertain.
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.