The short version of research chemical fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2025-08-21. Anything still debated is marked as such rather than presented as settled.
REV-ERB proteins help regulate daily cycles in gene expression, including genes tied to lipid and glucose metabolism. SR9009 binds these receptors and alters their activity in cell and animal experiments. Consequences observed in rodents include changes in skeletal muscle oxidative capacity, blood lipid levels, and exercise performance. The precise chain from receptor occupancy to whole-body effects is still an active area of study. Human responses cannot be assumed from rodent data.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Common name | SR9009 | Also referred to as Stenabolic in non-scientific contexts. |
| Chemical class | Synthetic small molecule | Not a steroid or peptide hormone. |
| Receptor target | REV-ERBα and REV-ERBβ | Nuclear receptor agonist in preclinical studies. |
| Development status | Investigational | No approved human therapeutic indication. |
| Regulatory attention | Prohibited in sport | Listed by anti-doping authorities. |
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. It is not an approved medicine and has no established human therapeutic use. The compound appears in scientific literature as a tool for probing circadian and metabolic regulation. Online sellers often label it as a research chemical, sometimes using the nickname Stenabolic. Its chemical identity is distinct from selective androgen receptor modulators, stimulants, and peroxisome proliferator-activated receptor delta agonists. Researchers use it mainly in cell and animal experiments.
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.
Detection of SR9009 in biological samples usually relies on liquid chromatography coupled to tandem mass spectrometry. This approach separates the compound from matrix components and identifies it by mass transitions. Because SR9009 can undergo metabolism, laboratories often look for both parent drug and specific metabolites. Sample preparation may involve protein precipitation or solid-phase extraction. Method validation examines sensitivity, carryover, and interference from related substances, and reference standards are required for accurate calibration.
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.
Taylor Farms recalls all iceberg lettuce sourced from central Mexico after federal health officials link shredded lettuce supplied by the company and served at Taco Bell restaurants in five states to an outbreak of cyclosporiasis that infects at least 1,644 people and hospitalizes 94. July 18 2026 Iran war: Iranian Deputy Foreign Minister Kazem Gharibabadi states that Iran suspended implementation of MoU commitments as part of the interim deal with the US, accusing the latter of breaching its own obligations. CENTCOM states that two American soldiers were killed, one went missing, four others were injured and some others were slightly wounded while defending against Iranian ballistic missile and drone attacks in Jordan the day before. On the same day, CENTCOM states that the US struck Iranian targets including Iranian troops who attacked its soldiers in retaliation to IRGC attack on its service members in Jordan. Social media personalities Andrew and Tristan Tate are arrested by the U.S. Marshals Service in Miami following a British request for their extradition. The brothers face charges in the United Kingdom including rape, assault and human trafficking, while Andrew also faces offences relating to indecent images of a child and extreme pornography. Both deny the allegations. July 19 2026 Iran war: U.S. forces shoot down Iranian missiles above Aqaba. The U.S.
4-Chloromethcathinone (also known as 4-CMC and clephedrone) is a stimulant drug of the cathinone class that has been sold online as a designer drug. 4-CMC produces similar effects to mephedrone, and has been sold as an alternative in countries where mephedrone was scheduled. 4-CMC produces similar side effects to mephedrone, including: increased blood pressure, tachycardia, hyperthermia, and anxiety. Its chemical structure closely resembles para-chloromethamphetamine, raising concerns about its potential to readily induce cell death of serotonergic neurons. However, no neurotoxicity of this kind has been found to occur, but studies involving mice do indicate that it is neurotoxic through other mechanisms, similarly to other cathinones. 4-CMC is cytotoxic and induces oxidative stress, more so than 4-MMC. Moreover, β-keto substitution is thought to change cathinone structure activity relationships (SAR) and metabolism compared to amphetamines, leading to differences in pharmacology.
The modern era of CCC began with the development of the planetary centrifuge by Dr. Yoichiro Ito which was first introduced in 1966 as a closed helical tube which was rotated on a "planetary" axis as is turned on a "sun" axis. A flow-through model was subsequently developed and the new technique was called countercurrent chromatography in 1970. The technique was further developed by employing test mixtures of DNP amino acids in a chloroform:glacial acetic acid:0.1 M aqueous hydrochloric acid (2:2:1 v/v) solvent system. Much development was needed to engineer the instrument so that required planetary motion could be sustained while the phases were being pumped through the coil(s). Parameters such as the relative rotation of the two axes (synchronous or non-synchronous), the direction of flow through the coil, and the rotor angles were investigated.
The second approach of bioprinting is autonomous self-assembly. This approach relies on the physical process of embryonic organ development as a model to replicate the tissues of interest. When cells are in their early development, they create their own extracellular matrix building block, the proper cell signaling, and independent arrangement and patterning to provide the required biological functions and micro-architecture. Autonomous self-assembly demands specific information about the developmental techniques of the tissues and organs of the embryo. There is a "scaffold-free" model that uses self-assembling spheroids that subjects to fusion and cell arrangement to resemble evolving tissues. Autonomous self-assembly depends on the cell as the fundamental driver of histogenesis, guiding the building blocks, structural and functional properties of these tissues. It demands a deeper understanding of how embryonic tissues mechanisms develop as well as the microenvironment surrounded to create the bioprinted tissues.
=== Metal generation === Most synthesis routines yield a mixture of different actinide isotopes in oxide forms, from which isotopes of americium can be separated. In a typical procedure, the spent reactor fuel (e.g. MOX fuel) is dissolved in nitric acid, and the bulk of uranium and plutonium is removed using a PUREX-type extraction (Plutonium–URanium EXtraction) with tributyl phosphate in a hydrocarbon. The lanthanides and remaining actinides are then separated from the aqueous residue (raffinate) by a diamide-based extraction, to give, after stripping, a mixture of trivalent actinides and lanthanides. Americium compounds are then selectively extracted using multi-step chromatographic and centrifugation techniques with an appropriate reagent. A large amount of work has been done on the solvent extraction of americium. For example, a 2003 EU-funded project codenamed "EUROPART" studied triazines and other compounds as potential extraction agents. A bis-triazinyl bipyridine complex was proposed in 2009 as such a reagent is highly selective to americium (and curium). Separation of americium from the highly similar curium can be achieved by treating a slurry of their hydroxides in aqueous sodium bicarbonate with ozone, at elevated temperatures. Both Am and Cm are mostly present in solutions in the +3 valence state; whereas curium remains unchanged, americium oxidizes to soluble Am(IV) complexes which can be washed away. Metallic americium is obtained by reduction from its compounds. Americium(III) fluoride was first used for this purpose.
Sources: en.wikipedia.org
=== Persian Gulf Arab states === The Arab states of the Persian Gulf started a campaign of prosecution against civilians and foreign citizens that shared or reposted rumors from unverified sources about the Iranian attacks, with the stated main goal to curb misinformation that could harm public order. Bahrain's Cyber Crime Directorate also started a campaign of arresting civilians in the country, which has a large Shiite minority, who allegedly expressed "their support for the Iranian shelling targeting the Kingdom of Bahrain", describing such activities as treason and as promotion of hostile acts against the state. Trump said "Even if we knew Gulf countries would be hit, big deal we did what we have to do". Saudi Arabia invoked its Strategic Mutual Defence Agreement with Pakistan. Pakistan deployed some 8,000 troops, a squadron of 16 aircraft, and two squadrons of drones. There was a pledge to send more if required. On 28 May, the US president Donald Trump threatened to "blow up" Oman if it failed to "behave" in a casual aside during a cabinet meeting after reports of talks between Iran and Oman about jointly charging a toll for ships passing through the Strait of Hormuz.
Relf's Philadelphia Gazette and Daily Advertiser reported that "Baron de Homboldt arrived in this city on Wednesday night." Meanwhile, Humboldt himself wasted no time in getting in touch with the President. He wrote the following in French on May 24:
A similar resemblance has been noted by Joanna Jurewicz, who argues that the first four nidanas resemble the Hymn of Creation (RigVeda X, 12) and other Vedic sources which describe the creation of the cosmos. Jurewicz argues that dependent origination is "a polemic" against the Vedic creation myth and that, paradoxically, "the Buddha extracted the essence of Vedic cosmogony and expressed in explicit language." Richard Gombrich agrees with this view, and argues that the first four elements of dependent origination are the Buddha's attempt to "ironize and criticize Vedic cosmogony." According to Gombrich, while in the Vedic creation theory "the universe is considered to be grounded on a primordial essence which is endowed with consciousness," the Buddha's theory avoids this essence (atman-Bahman). Jurewicz and Gombrich compare the first nidana, ignorance (avijja), with the stage before creation that is described in the Rigveda's Hymn of Creation. While the term avidya does not actually appear in this Hymn, the pre-creation stage is seen as unknowable and characterized by darkness. According to Gombrich, at this stage "consciousness is non-dual, which is to say that it is the ability to cognize but not yet consciousness of anything, for there is no split yet into subject and object." This is different from the Buddha's point of view, in which consciousness is always consciousness of something. Jurewicz then compares the Vedic creator's desire and hunger to create the atman (or "his second self") with volitional impulses (samskara).
A 2025 review of randomized and observational studies on transdermal clonidine reported that once-weekly patch formulations achieve blood pressure reductions similar to beta blockers, calcium channel blockers and diuretics, while reducing the risk of withdrawal-related rebound hypertension compared with oral clonidine. Clonidine is not considered a first-line treatment for hypertension due to its propensity to cause sedation and xerostomia compared with other antihypertensive medications (e.g., angiotensin-converting enzyme inhibitors). When used for blood pressure control, clonidine is typically reserved for hypertensive emergencies rather than routine management hypertension, but it is considered appropriate for treating resistant hypertension.
== Susceptibility to infection == Pandemics such as COVID-19 show that people dramatically differ in their susceptibility to infection. This may be because of general health, age, or their immune status, e.g. when they have been infected previously. However, it also has become clear that there are genetic factors which determine susceptibility to infection. For instance, up to 40% of SARS-CoV-2 infections may be asymptomatic, suggesting that many people are naturally protected from disease. Large genetic studies have defined risk factors for severe SARS-CoV-2 infections, and genome sequences from 659 patients with severe COVID-19 revealed genetic variants that appear to be associated with life-threatening disease. One gene identified in these studies is type I interferon (IFN). Autoantibodies against type I IFNs were found in up to 13.7% of patients with life-threatening COVID-19, indicating that a complex interaction between genetics and the immune system is important for natural resistance to Covid. Similarly, mutations in the ERAP2 gene, encoding endoplasmic reticulum aminopeptidase 2, seem to increase the susceptibility to the plague, the disease caused by an infection with the bacteria Yersinia pestis. People who inherited two copies of a complete variant of the gene were twice as likely to have survived the plague as those who inherited two copies of a truncated variant. Susceptibility also determined the epidemiology of infection, given that different populations have different genetic and environmental conditions that affect infections.
Sources: en.wikipedia.org
It is a synthetic compound studied as an agonist of REV-ERB nuclear receptors. It is not an approved medicine and has mainly been examined in laboratory and animal research.
No. It is a small molecule that binds nuclear receptors involved in circadian regulation. Its classification differs from anabolic steroids or peptide hormones.
Published human clinical trial data are lacking. Most safety and activity information comes from preclinical models, so effects in people remain uncertain.
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.