If you have been reading about LC-MS 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 2025-08-16. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
Regulatory treatment of SR9009 varies by country and context. It is not approved as a therapeutic drug by agencies such as the United States Food and Drug Administration or the European Medicines Agency. Sports authorities list it as a prohibited substance; the World Anti-Doping Agency classifies it among hormone and metabolic modulators. Legal status for personal possession or sale differs across jurisdictions, and some countries may restrict it under analog or research chemical laws. Buyers who seek verified material often rely on independent laboratory testing because online product labels may not match contents.
Laboratory samples of SR9009 are typically handled as research chemicals rather than pharmaceuticals. Suppliers usually state that the material is for research use only and not for human or veterinary administration. Storage recommendations generally call for a freezer at approximately −20 °C, protection from light, and a desiccated environment. The solid is often described as a white to off-white powder. Solubility is commonly reported in organic solvents such as dimethyl sulfoxide and ethanol, with low solubility in water.
| 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. |
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.
Regulatory status varies by country and intended use. Major drug agencies have not granted marketing authorization for SR9009 as a medicine, and it is not listed as a controlled substance in many jurisdictions. It is often sold as a research chemical, a category that may fall outside pharmaceutical manufacturing rules. Buyers should verify local laws and supplier documentation, including certificates of analysis. The lack of standardized quality controls raises concerns about identity, purity, and actual content in products marketed online.
In laboratory settings, SR9009 is typically characterized by liquid chromatography–mass spectrometry (LC-MS) or high-performance liquid chromatography with ultraviolet detection (HPLC-UV). These methods can confirm identity and estimate purity, but they require reference standards for accurate quantification. Because SR9009 is not a licensed pharmaceutical, no harmonized pharmacopeial monograph exists. Laboratories often validate in-house methods for matrices such as plasma, urine, or cell culture media. Sample preparation may involve protein precipitation or liquid-liquid extraction before analysis.
Physicochemical behavior influences handling. SR9009 is described as a solid with limited aqueous solubility, so organic solvents such as dimethyl sulfoxide or ethanol are common in research stock solutions. Aqueous dilution can produce precipitates if the organic content is too low. Light, heat, and repeated freeze-thaw cycles may affect stability. Storage recommendations usually specify a desiccated freezer environment protected from light, but exact stability data depend on the formulation and matrix.
SR9009 is not approved as a medicine by major regulatory agencies. It is commonly sold as a research chemical, a category that may fall outside customary drug approval and quality rules. In sports, the World Anti-Doping Agency lists SR9009 as a prohibited substance. Athletes who use it can face sanctions if it is detected in a sample. Legal status varies by country, and importation may be restricted. Enforcement practices differ across borders.
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.
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.
=== Contraindications and patient factors === Docetaxel is contraindicated for use with patients with a baseline neutrophil count less than 1500 cells/μL, a history of severe hypersensitivity reactions to docetaxel or polysorbate 80, severe liver impairment and pregnant or breast-feeding women. Side effects are experienced more frequently by patients of 65 years or older, but dosage is usually not decreased. Kidney failure is thought not to be a significant factor for docetaxel dosage adjustment. Patients with hepatic insufficiency resulting in serum bilirubin greater than the upper limit of normal (ULN) should not be administered docetaxel, though this is not a stated contraindication. Dosage should be reduced by 20% in people who develop grade 3 or 4 diarrhea following exposure to docetaxel, hepatotoxicity defined by liver enzymes at levels greater than five times the ULN, and grade 2 palmer-planter toxicity. Paediatric trials of docetaxel have been limited, and so safety of use in patients under 16 years has not been established.
Webber (1995), professor of law at Boston University School of Law Barry Scott Wimpfheimer (1995), professor of religious studies at Northwestern University, expert on the Talmud Lara Bazelon (1996), professor of law at University of San Francisco School of Law Gabriella Coleman (1996), anthropologist known for her work in hacker culture and online activism; professor at McGill University Elena Conis (1996), historian of medicine at University of California, Berkeley Leah DeVun (1997), professor of gender studies at Rutgers University Jessica Greenberg (1997), social anthropologist and professor at University of Illinois at Urbana–Champaign Lauren Winner (1997), historian, professor at Duke Divinity School Brooke Holmes (1998), classicist, professor at Princeton University Alison Gass (1998), former chief curator of the Cantor Arts Center, director of the Smart Museum of Art and the Institute of Contemporary Art San José Louis Hyman (1999), economic historian, professor at Cornell University School of Industrial and Labor Relations, author of Debtor Nation Adrianne Wadewitz (1999), feminist scholar and noted Wikipedian Yehuda Kurtzer (2000), president of the Shalom Hartman Institute, son of ambassador Daniel C.
=== Heart and vascular === The SOMC Heart Care Unit is a 12-bed unit responsible for the care of adult cardiac patients and patients recovering from open heart surgery. SOMC utilizes a Universal Bed Model, in which the patient's room essentially changes throughout the open-heart procedure, starting as an intensive care recovery room on arrival from surgery and transitioning to a home-like environment with family space and amenities. Heart and Vascular services provided at SOMC include:
Trails has been praised for its character arcs and worldbuilding, with its scope and sense of continuity being compared to the A Song of Ice and Fire novels by George R. R. Martin, the Forgotten Realms setting for Dungeons & Dragons, and the Marvel Cinematic Universe. Despite the series' English localization being praised for their quality, their slow release pace has been criticized, with them tending to lag years behind the original Japanese games. The music written for the series by Falcom Sound Team jdk, the company's team of composers, has also been praised. Characters or other elements from Trails have been featured in crossover promotions with other games, including Monster Hunter Frontier G, Chain Chronicle V, Dead or Alive 5, Fantasy Earth Zero, Langrisser Mobile, Utawarerumono: Zan, Valkyrie Anatomia, and a few Japanese mobile games. Characters from the series were also featured in a 2019 collaboration event with VREX, a virtual reality game arcade and café in Japan. As of 2021, a list of Trails characters was the largest article on the Japanese Wikipedia at over 440,000 characters. As of 2025, the series had sold nine million copies worldwide.
== Fifth Ministry == On 16 December 1977, following the 1977 election on 12 November, the Ministry was reconstituted. Due to the death of Keith Hooper on 23 August 1977, there was a vacancy in the outgoing ministry, to which Charles Porter was appointed. A number of minor changes occurred:
Sources: en.wikipedia.org
Gochujang's primary ingredients are red chili powder (고추가루; gochugaru), glutinous rice powder, powdered fermented soybeans, and salt. Korean chili peppers, of the species Capsicum annuum, are spicy yet sweet, making them ideal for gochujang production. Gochujang is typically made from 25% red pepper powder, 22.2% glutinous rice, 5.5% meju powder (60% cooked soybeans and 40% non-glutinous rice), 12.8% salt, 5% malt, and 29% water. Other recipes use glutinous rice (찹쌀; chapssal), normal short-grain rice (맵쌀; mepssal), or barley. Less common additions include whole wheat kernels, jujubes, pumpkin, and sweet potato. A small amount of sweetener, such as sugar, syrup, or honey, is also sometimes added. The finished product is a dark red paste, with a rich, piquant flavor. The making of gochujang at home began tapering off when commercial production came into the mass market in the early 1970s. Now, most Koreans purchase gochujang at grocery stores or markets. It is still used extensively in Korean cooking to flavor stews (jjigae), such as in gochujang jjigae; to marinate meat, such as in gochujang bulgogi; and as a condiment for naengmyeon and bibimbap. Gochujang is also used as a base for making other condiments, such as chogochujang (초고추장) and ssamjang (쌈장). Chogochujang is a variant of gochujang made by adding vinegar and other seasonings, such as sugar and sesame seeds. It is usually used as a sauce for hoe and hoedeopbap.
=== Detection in body fluids === Tetrodotoxin may be quantified in serum, whole blood or urine to confirm a diagnosis of poisoning in hospitalized patients or to assist in the forensic investigation of a case of fatal overdosage. Most analytical techniques involve mass spectrometric detection following gas or liquid chromatographic separation.
A series of steps catalyzed in part by the recombinase then leads to joining of the two helices by at least one Holliday junction, in which a segment of a single strand in each helix is annealed to the complementary strand in the other helix. The Holliday junction is a tetrahedral junction structure that can be moved along the pair of chromosomes, swapping one strand for another. The recombination reaction is then halted by cleavage of the junction and re-ligation of the released DNA. Only strands of like polarity exchange DNA during recombination. There are two types of cleavage: east-west cleavage and north–south cleavage. The north–south cleavage nicks both strands of DNA, while the east–west cleavage has one strand of DNA intact. The formation of a Holliday junction during recombination makes it possible for genetic diversity, genes to exchange on chromosomes, and expression of wild-type viral genomes.
Sugiol is a protic molecule. Protic molecules are those that have protic groups or hydrogen molecules that readily leave the molecule, such as -OH, -NH, and -HF. These molecules can complicate GC/MS data by increasing peak tailing and affecting the ease with which they can be separated by the GC. In order to avoid this effect, protic molecules are often subjected to derivatization reactions, in which the offending protons are replaced by a different functional group. A commonly used replacement group is trimethylsilyl (TMS), which produces trimethylsilyl derivatives of the original protic molecules. Another commonly used group is tert-butyldimethylsilyl (TBDMS), also used to derivatize hydroxyl and amine protic groups. Diazomethane has also been used to form methyl esters from carboxylic acids.
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.
Legality depends on the country and the intended use. In many places it is sold as a research chemical, but sports and medicine regulations restrict it.