LC-MS/MS raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
This page was last updated on 2026-04-02 and is reviewed periodically as new material appears.
SR9009 is frequently discussed in fitness and research-chemical contexts, yet it has no approved medical indication. Regulatory agencies have not authorized it for human use, and it is not a standard prescription drug. Some sports organizations list it as a prohibited substance because of its potential performance-enhancing properties. Published human data are sparse, so claims about its effects in people often rely on animal models or anecdotal reports. Quality and identity of online materials can vary widely.
SR9009 is a synthetic small molecule studied as a REV-ERB agonist. REV-ERBα and REV-ERBβ are nuclear receptors that help regulate circadian rhythms and metabolic gene expression. The compound was identified in academic screening efforts to find synthetic ligands for these receptors. In cell and animal studies, SR9009 alters transcription of genes involved in lipid and glucose metabolism, and it can shift circadian behavior. It is not an approved therapeutic agent.
Mechanistically, SR9009 binds the ligand-binding domain of REV-ERBα/β and enhances recruitment of corepressor complexes. This represses target genes rather than activating them. Because REV-ERB proteins normally compete with ROR proteins at shared response elements, the net effect depends on tissue and timing. Researchers use SR9009 to probe how nuclear receptor signaling links the clock to metabolism, inflammation, and muscle biology. Findings are largely preclinical, and the precise contribution of each receptor subtype remains under study.
Detection of SR9009 in biological samples usually employs liquid chromatography coupled with tandem mass spectrometry. This method can identify the parent compound and sometimes metabolites in urine or blood. Because exposure can be low and clearance may be rapid, sample timing and limits of detection matter. Laboratories validate assays for sensitivity and specificity. Results are interpreted alongside chain-of-custody and quality-control records. Urine is the common matrix for anti-doping analysis, while blood may be used in research settings.
Handling recommendations for SR9009 in a laboratory setting include storing the solid at low temperature, protected from light and moisture. The compound is often dissolved in dimethyl sulfoxide or ethanol for experiments. Solutions should be prepared with appropriate personal protective equipment and disposed of according to local rules. Stability data for long-term storage are limited, so stock solutions are typically kept cold and used within defined periods. Records of preparation date and concentration support reproducibility.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Small-molecule ligand; not a hormone or peptide |
| Molecular formula | C20H24ClN3O4S | Reported for the free base |
| CAS Registry Number | 1379686-30-2 | Unique chemical identifier |
| Common synonyms | SR9009; stenabolic | Stenabolic is informal and not an official name |
| Reported targets | REV-ERBα and REV-ERBβ | Nuclear receptors linked to circadian and metabolic regulation |
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.
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.
SR9009 is a synthetic small molecule that acts on the nuclear receptors REV-ERBα and REV-ERBβ. These receptors are part of the circadian clock machinery and normally repress transcription of certain target genes. In laboratory research, SR9009 is used as a chemical tool to study how REV-ERB activity influences metabolism, inflammation, and daily biological rhythms. The compound is not an approved medicine, and its effects in humans remain largely uncharacterized. It is often described as an investigational agent rather than a therapeutic product.
Two of his bodyguards and a female pedestrian were killed in the assassination attempt as well. While Tweeting from his hospital bed, Garcia blamed the CJNG for the failed attempt on his life and had 12 suspected CJNG members arrested by the end of the day. The same day, it emerged that the CJNG still controlled organized crime in Jalisco, Guanajuato, Querétaro, Hidalgo, but no longer was listed as having such control in any municipality in Veracruz and still was unable to take away territory in other parts of southeastern Mexico controlled by the Sinaloa Cartel, Los Zetas and the so-called Los Pelones group. Sánchez was later murdered, with his body being discovered stabbed and wrapped in plastic on a park bench in downtown Tlaquepaque on 18 March 2021. Emilio Alejandro Pulido Salazar would surrender to Mexican authorities the same month. Érick Valencia Salazar, alias "El 85", was presumed to be the head of the Nuevo Plaza Cartel at the time of El Cholo's death. In February 2022, leading CJNG operator in Michoacán and trusted El Mencho associate Miguel Ángel Fernández, known as "El M2", was found murdered in the town of Cansangüe, located in the municipality of Tepalcatepec El 85 was later captured by Mexican authorities in September 2022. By November 2021, El Mencho and his wife Rosalinda's younger sisters were the only CJNG members to remain at large who were also among the cartel's original founders. In May 2022, Insight Crime reporter Peter Appleby reported that El Mencho's poor health, and also rumored death, accelerated break-ups and infighting in the CJNG.
Initiation the halogen radicals form by homolysis. Usually, energy in the form of heat or light is required. Chain reaction or Propagation then takes place—the halogen radical abstracts a hydrogen from the alkane to give an alkyl radical. This reacts further. Chain termination where the radicals recombine. Experiments have shown that all halogenation produces a mixture of all possible isomers, indicating that all hydrogen atoms are susceptible to reaction. The mixture produced, however, is not statistical: Secondary and tertiary hydrogen atoms are preferentially replaced due to the greater stability of secondary and tertiary free-radicals. An example can be seen in the monobromination of propane:
==== Weak partial androgenic activity ==== CPA, like spironolactone and other steroidal antiandrogens such as chlormadinone acetate and megestrol acetate, is actually not a pure antagonist of the AR – that is, a silent antagonist – but rather appears to be a very weak partial agonist. Clinically, CPA generally functions purely as an antiandrogen, as it displaces much more efficacious endogenous androgens such as testosterone and DHT from interacting with the receptor and thus its net effect is virtually always to lower physiological androgenic activity. But unlike silent antagonists of the AR like nonsteroidal antiandrogens such as flutamide, bicalutamide, and enzalutamide, CPA, by virtue of its slight intrinsic activity at the AR, may be unable to fully inhibit androgenic signaling in the body, which may persist to an extent in some tissues such as the prostate gland. In accordance with its albeit weak capacity for activation of the AR, CPA has been found to stimulate androgen-sensitive carcinoma growth in the absence of other androgens, an effect which could be blocked by co-treatment with flutamide. In one study in rodents, DHT-stimulated prostate weight remained 40% above controls with administration of CPA even at the highest dosage, while flutamide was able to completely block the stimulatory effects of DHT. In addition, CPA alone increased prostate weight by 60%, whereas flutamide had no effect.
His work has also examined the changing role of behavioral treatment when used with GLP-1 medications, as well as the psychiatric safety of the new drugs. With colleague Gary Foster, Wadden developed the Weight and Lifestyle Inventory (WALI), a widely used self-report tool for obesity assessment, including in bariatric surgery programs. He has published more than 500 refereed papers and 40 book chapters, and co-edited seven books, including Handbook of Obesity Treatment. Since 2020, he has been recognized by Clarivate as a Highly Cited Researcher across multiple fields.
Sources: en.wikipedia.org
Bavaria (The geographically distinct Palatinate, which was part of Bavaria, 1816–1946, is now part of Rheinland Pfalz). Bremen Hamburg Hesse Saxony Thuringia The other 11 states of the Weimar Republic either merged into one another or were separated into smaller entities:
== Pathophysiology == RA primarily starts as a state of persistent cellular activation leading to autoimmunity and immune complexes in joints and other organs where it manifests. The clinical manifestations of disease are primarily inflammation of the synovial membrane and joint damage, and the fibroblast-like synoviocytes play a key role in these pathogenic processes. Three phases of progression of RA are an initiation phase (due to non-specific inflammation), an amplification phase (due to T cell activation), and chronic inflammatory phase, with tissue injury resulting from the cytokines, IL–1, TNF-alpha, and IL–6.
Following the deaths of children in China from powdered milk in 2008, the Joint Research Centre (JRC) of the European Commission in Belgium set up a website about methods to detect melamine. In May 2009, the JRC published the results of a study that benchmarked the ability of labs around the world to accurately measure melamine in food. The study concluded that the majority of labs can effectively detect melamine in food. In October 2008, the U.S. Food and Drug Administration (FDA) issued new methods for the analysis of melamine and cyanuric acid in infant formulations in the Laboratory Information Bulletin No 4421. Similar recommendations have been issued by other authorities, like the Japanese Ministry of Health, Labor and Welfare, both based on liquid chromatography – mass spectrometry (LC/MS) detection after hydrophilic interaction liquid chromatography (HILIC) separation. The existing methods for melamine determination using a triple quadrupole liquid chromatography – mass spectrometry (LC/MS) after solid phase extraction (SPE) are often complex and time-consuming. However, electrospray ionization methods coupled with mass spectrometry allow a rapid and direct analysis of samples with complex matrices: the native liquid samples are directly ionized under ambient conditions in their original solution. In December 2008, two new fast and inexpensive methods for detecting melamine in liquids have been published.
Laccases (EC 1.10.3.2) are multicopper oxidases found in plants, fungi, and bacteria. Laccases oxidize a variety of phenolic substrates, performing one-electron oxidations, leading to crosslinking. For example, laccases play a role in the formation of lignin by promoting the oxidative coupling of monolignols, a family of naturally occurring phenols. Other laccases, such as those produced by the fungus Pleurotus ostreatus, play a role in the degradation of lignin, and can therefore be classed as lignin-modifying enzymes. Other laccases produced by fungi can facilitate the biosynthesis of melanin pigments. Laccases catalyze ring cleavage of aromatic compounds. Laccase was first studied by Hikorokuro Yoshida in 1883 and then by Gabriel Bertrand in 1894 in the sap of the Japanese lacquer tree, where it helps to form lacquer, hence the name laccase.
It will however, place its current focus on following the sale, to operate its other retail businesses in Singapore, primarily focusing on 7-Eleven (convenience stores) and Guardian (health and beauty stores).
Sources: en.wikipedia.org
== Diseases and pests == Stem rot disease is caused by the fungus Agroathelia rolfsii (aka Sclerotium rolfsii or Athelia rolfsii), which is one of the most important pathogens causing tuber and stem rot and up to 60% loss in Jerusalem artichoke yield. Growing resistant varieties is an important method of controlling Agroathelia rolfsii.
The nervous system is large relative to the bird's size. The most developed part of the brain of birds is the one that controls the flight-related functions, while the cerebellum coordinates movement and the cerebrum controls behaviour patterns, navigation, mating and nest building. Most birds have a poor sense of smell with notable exceptions including kiwis, New World vultures and tubenoses. The avian visual system is usually highly developed. Water birds have special flexible lenses, allowing accommodation for vision in air and water. Some species also have dual fovea. Birds are tetrachromatic, possessing ultraviolet (UV) sensitive cone cells in the eye as well as green, red and blue ones. They also have double cones, likely to mediate achromatic vision.
Diversity of odourant binding proteins revealed by an expressed sequence tag project on male Manduca sexta moth antennae. Insect Mol Biol. 1999; 8: 501-518. 49. Picimbon JF, Regnault-Roger C 2008. Composés sémiochimiques volatils, phytoprotection et olfaction : cibles moléculaires de la lutte intégrée. In: Eds: C. Regnault-Roger C, B. Philogène B, and Vincent C (Eds.), Biopesticides d’origine végétale, Lavoisier Tech and Doc, Paris, France, 2008, pp. 383–415. 50. Einhorn E, Imler JL. Insect immunity; from systemic to chemosensory organs protection. In: Picimbon JF (Ed.), Olfactory Concepts of Insect Control-Alternative to Insecticides. vol. 2 Springer Nature, Switzerland, 2019, pp. 205–229.
Cannabichromene (CBC) is a minor non-psychotic phytocannabinoid that is capable of anti-inflammatory, anti-nociceptive, and anti-convulsant properties. Research further indicates that CBC induces programmed cell death via apoptosis and ferroptosis in pancreatic cancer cells by serving as a potent agonist of TRPV1 and CB2 receptors. Also, CBC helps the brain to stay healthy by preventing the Neural Stem Progenitor Cells (NSPCs) from turning into reactive astrocytes, which can cause inflammation that can damage the brain.
== Speech at the Ceremony Marking the 65th Anniversary of the Basic Law, Germany’s Constitution (2014) == On May 23, 2014, the German Parliament Bundestag held a ceremony commemorating the proclamation of the Basic Law on May 23, 1949. Kermani was invited as the keynote speaker. In his speech, he analyzed the language of the Basic Law, comparing its impact to that of the Luther Bible. Kermani discussed the historic progress made in the postwar period and noted that the Basic Law had created a new reality. Kermani praised the Federal Republic of Germany for upholding constitutional norms. He also commended German society for its willingness to bring about integration and its efforts in this regard. He mentioned Willy Brandt several times. Referring to Brandt, Kermani noted, “If I were to name a single day, a single event, a single gesture in postwar German history for which the word ‘dignity’ seems appropriate, (…) it would be Brandt’s kneeling in Warsaw.” Kermani sharply criticized the restriction of the right to asylum through the 1993 amendment to the Basic Law (asylum compromise), which he described as a distortion of Article 16a and a mutilation of the Constitution. Nevertheless, he emphasized the opportunities that the Federal Republic of Germany has offered immigrants. He concluded his speech—on their behalf—with the words Thank you, Germany. Some members of the CDU/CSU parliamentary group criticized the speech as one-sided or biased; Georg Nüßlein (CSU) left the chamber. In the German media, however, the speech was well received and positively discussed.
Sources: en.wikipedia.org
SR9009 is a synthetic compound investigated as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is used in preclinical research on circadian rhythm and metabolism. It is not an approved drug.
No. It has no approved medical indication, and human safety and efficacy data are limited. It appears in research chemical markets and is banned by some sports authorities.
Natural ligands include heme and certain metabolites; SR9009 is a synthetic small molecule with higher potency and selectivity in some assays. Its effects depend on cell type and timing. It is not a naturally occurring compound.
Its legal status depends on the country and intended use. It is not an approved medicine in major jurisdictions. In sport, it is prohibited by anti-doping rules.