The short version of research chemical fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-07-16. Anything still debated is marked as such rather than presented as settled.
In laboratory settings, SR9009 is commonly identified by its molecular structure and its interaction with REV-ERB receptors. Vendors may list it under synonyms such as Stenabolic or REV-ERB agonist, but those names do not define purity or identity. Analytical confirmation typically uses high-performance liquid chromatography with ultraviolet detection or liquid chromatography–mass spectrometry. A reference standard is needed to compare retention time and mass spectrum, because the compound can be confused with related research chemicals.
Handling practices for SR9009 focus on minimizing degradation and contamination. The solid is generally stored desiccated at or below -20 °C, protected from light and moisture. Stock solutions are often prepared in dimethyl sulfoxide or ethanol, then aliquoted to avoid repeated freeze–thaw cycles. Aqueous solubility is low, so formulations for animal studies may require cosolvents or suspending agents. Personnel should follow institutional chemical safety procedures, because toxicological data for humans are incomplete.
Storage recommendations for SR9009 reference material typically specify a freezer at -20 °C or lower, with protection from moisture and light. Repeated freeze-thaw cycles can degrade small molecules and introduce variability. Stock solutions in dimethyl sulfoxide are often aliquoted to avoid repeated handling. Stability studies may examine degradation under heat, humidity, and light exposure. The compound's thiophene and nitro groups can participate in reactions that alter analytical signals over time, so such changes affect quantitative results.
Quality control for research materials includes identity confirmation by nuclear magnetic resonance and purity assessment by high-performance liquid chromatography. Mass spectrometry provides molecular weight confirmation and can detect related impurities. Purchasers should request a certificate of analysis that lists lot-specific data. Online products advertised for human use often lack such documentation. Distinguishing legitimate research material from mislabeled or contaminated samples is a recurring challenge in independent testing, and independent laboratories may use orthogonal methods to verify identity.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white solid | Visual inspection is not sufficient for identity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water. |
| Typical storage | -20 °C, desiccated, dark | Protect from repeated temperature changes. |
| Common analytical method | LC-MS or HPLC-UV | Reference standard required for comparison. |
| Common synonyms | SR9009; Stenabolic; REV-ERB agonist | Vendor naming may vary. |
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.
Preclinical reports have linked SR9009 to improved endurance and altered energy expenditure in rodents. Such findings have prompted interest in whether REV-ERB activation can influence skeletal muscle metabolism. However, the reported effects depend on dose, route, and experimental model, and replication across laboratories is limited. Human trials have not established comparable outcomes, so claims about exercise performance remain speculative. The absence of controlled human data is a central limitation in interpreting these observations.
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.
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.
Thyroglobulin (Tg) is a 660 kDa, dimeric glycoprotein produced by the follicular cells of the thyroid and used entirely within the thyroid gland. Tg is secreted and accumulated at hundreds of grams per litre in the extracellular compartment of the thyroid follicles, accounting for approximately half of the protein content of the thyroid gland. Human TG (hTG) is a homodimer of subunits each containing 2768 amino acids as synthesized (a short signal peptide of 19 amino acids may be removed from the N-terminus in the mature protein). Thyroglobulin is in all vertebrates the main precursor to thyroid hormones, which are produced when thyroglobulin's tyrosine residues are combined with iodine and the protein is subsequently cleaved. Each thyroglobulin molecule contains approximately 16 tyrosine residues, but only around 10 of these are subject to iodination by thyroperoxidase in the follicular colloid. It takes two iodinated tyrosines to make a thyroid hormone molecule; therefore, each Tg molecule forms approximately 5 thyroid hormone molecules.
== Further reading == Donald, Bruce R. (2011). Algorithms in Structural Molecular Biology. Computational Molecular Biology. Cambridge, Mass.: The MIT Press. ISBN 978-0-262-01559-2. OCLC 1200909148. Jin, Wenzhen; Kambara, Ohki; Sasakawa, Hiroaki; Tamura, Atsuo & Takada, Shoji (May 2003). "De Novo Design of Foldable Proteins with Smooth Folding Funnel: Automated Negative Design and Experimental Verification". Structure. 11 (5): 581–590. doi:10.1016/S0969-2126(03)00075-3. PMID 12737823. Pokala, Navin & Handel, Tracy M. (2005). "Energy Functions for Protein Design: Adjustment with Protein–Protein Complex Affinities, Models for the Unfolded State, and Negative Design of Solubility and Specificity". Journal of Molecular Biology. 347 (1): 203–227. doi:10.1016/j.jmb.2004.12.019. PMID 15733929. Sander, Chris; Vriend, Gerrit; Bazan, Fernando; Horovitz, Amnon; Nakamura, Haruki; Ribas, Luis; Finkelstein, Alexei V.; Lockhart, Andrew; Merkl, Rainer; et al. (February 1992). "Protein Design on Computers. Five New Proteins: Shpilka, Grendel, Fingerclasp, Leather and Aida". Proteins: Structure, Function, and Bioinformatics. 12 (2): 105–110. doi:10.1002/prot.340120203. PMID 1603799. S2CID 38986245.
=== Pharmacodynamics === Baclofen produces its effects by selectively activating the GABAB receptor. Baclofen is postulated to block mono-and-polysynaptic reflexes by acting as an inhibitory ligand, inhibiting the release of excitatory neurotransmitters. Baclofen does not have significant affinity for the GHB receptor, and has no known abuse potential. Agonism of GABAB receptors is thought to be responsible for baclofen's range of therapeutic properties, as GABAB knockout mice are unresponsive to the neurobiological effects of baclofen. For drug-reward and addiction, baclofen's mechanism of action is thought to be through its effect on the mesolimbic dopamine pathway, specifically leading to a decrease in dopamine release associated with alcohol. GABAB receptor activation (GABAB receptor agonist activity) may decrease or inhibit alcohol's ability to activate or fire dopaminergic neurons following exposure to alcohol. Baclofen's mechanism of action when used to treat alcohol use disorder is not thought to be mediated through its muscle-relaxing or sedative properties, however there is evidence to suggest that the GABAB receptor-activation in the limbus may also reduce feelings of anxiety in people with alcohol use disorder.
Remimazolam, sold under the brand name Byfavo, is a medication for the induction and maintenance of procedural sedation in adults for invasive diagnostic or surgical procedures lasting 30 minutes or less. It is a benzodiazepine drug, developed by PAION AG in collaboration with several regional licensees as an alternative to the short-acting imidazobenzodiazepine midazolam, for use in the induction of anesthesia and conscious sedation for minor invasive procedures. Remimazolam was found to have both a more rapid onset and a shorter duration than midazolam, and human clinical trials showed a faster recovery time and predictable, consistent pharmacokinetics, suggesting some advantages over existing drugs for these applications. The most common side effects for procedural sedation include low blood pressure, high blood pressure, diastolic hypertension, systolic hypertension, low blood oxygen level, and diastolic hypotension. Remimazolam was approved for medical use in the United States in July 2020, and in the European Union in March 2021.
Sources: en.wikipedia.org
Pneumatic tube systems have been used in nuclear chemistry to transport samples during neutron activation analysis. Samples must be moved from the nuclear reactor core, in which they are bombarded with neutrons, to the instrument that measures the resulting radiation. As some of the radioactive isotopes in the sample can have very short half-lives, speed is important. These systems may be automated, with a magazine of sample tubes that are moved into the reactor core in turn for a predetermined time, before being moved to the instrument station and finally to a container for storage and disposal. Until it closed in early 2011, a McDonald's in Edina, Minnesota claimed to be the "World's Only Pneumatic Air Drive-Thru," sending food from their strip-mall location to a drive-through in the middle of a parking lot. Technology editor Quentin Hardy noted renewed interest as of 2015 in transmission of data by pneumatic tube accompanied discussions of digital network security, and he cited research into London's forgotten pneumatic network. Translogic is one of the largest modern healthcare pneumatic tube providers. KUKA is a German manufacturer of industrial robots and factory automation systems. In 2016, the company was acquired by the Chinese appliance manufacturer Midea Group. KUKA acquired Swisslog in 2014 and Translogic in 1999. Related applications include fish cannons which use mechanisms very similar to pneumatic tube systems.
=== Support groups === People affected by amyloidosis are supported by organizations, including the Amyloidosis Research Consortium, Amyloidosis Foundation, Amyloidosis Support Groups, and Australian Amyloidosis Network.
==== Australia ==== Oxycodone is in Schedule I (derived from the Single Convention on Narcotic Drugs) of the Commonwealth's Narcotic Drugs Act 1967. In addition, it is in Schedule 8 of the Australian Standard for the Uniform Scheduling of Drugs and Poisons ("Poisons Standard"), meaning it is a "controlled drug... which should be available for use but require[s] restriction of manufacture, supply, distribution, possession and use to reduce abuse, misuse and physical or psychological dependence".
19 December – With the UK government signalling its willingness to delay local elections due in May 2026 for a year, the Electoral Commission raises concerns about further delays to elections, describing the process as one that is "damaging public confidence". 21 December – The Electoral Commission finds no "credible evidence of potential offences of electoral law" over Nigel Farage's election expenses. Scottish Labour MSP Pam Duncan-Glancy confirms she will not seek re-election to the Scottish Parliament at the 2026 election because she does not want her friendship with a convicted sex offender to "become a distraction". 22 December – Liberal Democrat leader Sir Ed Davey writes to the Equalities and Human Rights Commission to ask it to investigate government plans to delay local elections, which could affect as many as 10 million voters. The leader of Plymouth City Council confirms that local elections there will go ahead in May, but local elections in Exeter are still uncertain. 23 December – The UK government announces it is watering down its plans for inheritance tax on farmers, and will raise the threshold from £1m to £2.5m. Local Government Secretary Steve Reed writes to councils in England warning them not to adopt a four-day working week. Scotland's Justice Secretary, Angela Constance, is to face an investigation over comments she made about a grooming gang expert to determine whether she broke the ministerial code.
== Treatment == Traditionally, nothing by mouth was considered to be mandatory in all cases, but gentle feeding by enteral feeding tube may help to restore motility by triggering the gut's normal feedback signals, so this is the recommended management initially. When the patient has severe, persistent signs that motility is completely disrupted, nasogastric suction and parenteral nutrition may be required until passage is restored. In such cases, continuing aggressive enteral feeding causes a risk of perforating the gut. Several options are available in the case of paralytic ileus. Most treatment is supportive. If caused by medication, the offending agent is discontinued or reduced. Bowel movements may be stimulated by prescribing lactulose, erythromycin or, in severe cases that are thought to have a neurological component (such as Ogilvie's syndrome), neostigmine. There is also evidence from a systematic review of randomized controlled trials that chewing gum, as a form of 'sham feeding', may stimulate gastrointestinal motility in the post-operative period and reduce the duration of postoperative ileus. If possible, the underlying cause is corrected (e.g. replace electrolytes).
Sources: en.wikipedia.org
In the final step of the biosynthesis, two molecules of 6,7-dimethyl-8-ribityllumazine are combined by the enzyme riboflavin synthase in a dismutation reaction. This generates one molecule of riboflavin and one of 5-amino-6-(D-ribitylamino) uracil. The latter is recycled to the previous reaction in the sequence.
The compartmentalization afforded by the periplasmic space gives rise to several important functions. Aside from those previously mentioned, the periplasm also functions in protein transport and quality control, analogous to the endoplasmic reticulum in eukaryotes. Furthermore, the separation of the periplasm from the cytoplasm allows for the compartmentalization of enzymes that could be toxic in the cytoplasm. Some peptidoglycans and lipoproteins located in the periplasm provide a structural support system for the cell that aids in promoting the cell's ability to withstand turgor pressure. Notably, organelles such as the flagellum require the assembly of polymers within the periplasm for proper functioning. As the driveshaft of the flagellum spans the periplasmic space, its length is dictated by positioning of the outer membrane as induced by its contraction, which is mediated by periplasmic polymers. The periplasm also functions in cell signaling, such as in the case of the lipoprotein RcsF, which has a globular domain residing in the periplasm and acts as a stress sensor. When RcsF fails to interact with BamA, such as in the case of an enlarged periplasm, RcsF is not exported to the cell surface and are able to trigger the Rcs signaling cascade. Periplasm size, therefore, plays an important role in stress signaling.
=== Temporal lobe epilepsy === Slow waves, including delta waves, are associated with seizure-like activity within the brain. W. Grey Walter was the first person to use delta waves from an EEG to locate brain tumors and lesions causing temporal lobe epilepsy. Neurofeedback has been suggested as a treatment for temporal lobe epilepsy, and theoretically acts to reduce inappropriate delta wave intrusion, although there has been limited clinical research in this area.
== History == It was published in 1950 by Blakiston. Creator and editor Tinsley Harrison's quotation appeared on the first edition of this book in 1950: No greater opportunity or obligation can fall the lot of a human being than to be a physician. In the care of suffering he needs technical skill, scientific knowledge and human understanding. He who uses these with courage, humility and wisdom will provide a unique service to his fellow man and will build an enduring edifice of character within himself. The physician should ask of his destiny no more than this and he should be content with no less. Blakiston was acquired by McGraw-Hill in 1954. The 17th edition of the textbook is dedicated to George W. Thorn, who was editor of the first seven editions of the book and editor in chief of the eighth edition. He died in 2004. The 18th edition of the book (ISBN 978-0071748896) was edited by Anthony Fauci, Dennis Kasper, Stephen Hauser, J. Larry Jameson and Joseph Loscalzo. New chapters added include "Systems Biology in Health and Disease," "The Human Microbiome," "The Biology of Aging," and "Neuropsychiatric Illnesses in War Veterans." The 19th edition of the book was edited by Dennis Kasper, Anthony Fauci, Stephen Hauser, Dan Longo, J. Larry Jameson and Joseph Loscalzo. AL.com in December 2014 wrote that it was still "a best-selling internal medicine text in the United States and around the world," and that it had been reprinted 16 times and translated into 14 languages. The 20th edition of the book, edited by Dennis Kasper, Anthony Fauci, Stephen Hauser, Dan Longo, J.
Sources: en.wikipedia.org
Liquid chromatography–mass spectrometry is common for identity and purity checks. High-performance liquid chromatography with ultraviolet detection can also be used. Both methods require a suitable reference standard.
The solid is usually kept desiccated at -20 °C or lower and protected from light. Stock solutions are aliquoted to limit freeze–thaw cycles. Aqueous solutions are not generally recommended for long-term storage.
Laws differ by country and by intended use. It is not an approved medicine, and many vendors sell it as a research chemical. Purchasers are responsible for confirming local restrictions.
Liquid chromatography-tandem mass spectrometry is a common approach. It can detect the parent compound and its metabolites in biological matrices.