A practical reference on LC-MS/MS: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2026-07-25. Anything still debated is marked as such rather than presented as settled.
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.
SR9009 is supplied as a solid research chemical, often in milligram quantities. Laboratories typically weigh it in a controlled environment because fine powders can disperse. Stock solutions are commonly prepared in dimethyl sulfoxide and stored in small aliquots to reduce freeze-thaw cycles. Personal protective equipment and chemical fume hoods are standard when handling unknown or potent compounds. These practices address laboratory safety rather than human use.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Synonyms | SR9009; Stenabolic | Stenabolic is an informal name |
| Common form | Crystalline powder | Supplied in milligram to gram quantities |
| Long-term storage | -20 °C, desiccated, protected from light | Reduces degradation |
| Detection technique | LC-MS/MS | Common in anti-doping and research analysis |
| Regulatory status | Prohibited in sport by WADA | Not approved for human therapeutic use |
Several misconceptions surround SR9009. It is often described as a SARM, a steroid, or an exercise pill, but its known target is the REV-ERB receptor family. Rodent studies have examined exercise capacity and metabolic markers, yet human outcomes remain unproven. Oral bioavailability appears low in animals, and human pharmacokinetics are not well characterized. Online products may contain impurities or different compounds, so identity and purity testing are important for research use.
Analytical chemists detect SR9009 with liquid chromatography-tandem mass spectrometry, commonly abbreviated LC-MS/MS. Sample preparation may involve protein precipitation, liquid-liquid extraction, or solid-phase extraction before analysis. Laboratories can target the parent compound or its metabolites, depending on the matrix and the purpose of testing. Anti-doping methods require sensitive and specific assays because concentrations in biological samples can be low. Reference standards and validated methods are essential for reliable identification and quantification.
Regulatory agencies have not approved SR9009 for human therapeutic use. It is typically sold as a research chemical with labels stating that it is not for human consumption. The World Anti-Doping Agency prohibits the substance in sport, generally under the category of non-approved substances. Customs and national laws may restrict importation, sale, or possession. Product quality and legal status can vary by country and vendor, and therapeutic claims are not permitted in regulated advertising because the compound lacks approval.
SR9009 is often grouped with compounds studied for circadian and metabolic regulation rather than with classical anabolic steroids. Its interactions with nuclear receptors differ from those of androgen receptor ligands, and its proposed mechanisms involve transcriptional control rather than direct hormone signaling. Some sources classify it as a metabolic modulator because of observed effects on energy utilization. The distinction matters for regulation and for interpreting research results across different compound classes.
SR9009 is a synthetic small molecule developed as a REV-ERB agonist. It binds to REV-ERBα and REV-ERBβ, nuclear receptors that help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, the compound alters lipid and glucose handling and influences skeletal muscle oxidative capacity. Its exact effects in humans remain largely uncharacterized because controlled clinical trials have not been reported. The molecule is frequently described in preclinical literature as a metabolic modulator.
Research interest in SR9009 grew from studies showing improved running endurance in mice after short treatment periods. Those experiments linked the compound to increased mitochondrial content and fatty acid oxidation in muscle, but the findings come from animal models and specific dosing schedules. Independent replication has been limited, and the pathways connecting REV-ERB activation to exercise performance are still being mapped. Whether similar responses occur in humans is an open question.
Clindamycin/benzoyl peroxide, sold under the brand name Benzaclin among others, is a topical gel used for the treatment of acne. It is a fixed-dose combination of clindamycin, as the phosphate, an antibiotic; and benzoyl peroxide, an antiseptic. Common side effects include peeling, itching, and dryness of the skin where the gel was applied. Clindamycin/benzoyl peroxide was approved for medical use in the United States in December 2000. It is available as a generic medication.
=== Scotland to England in 1984 === He began at the age of 18 at John o' Groats (at the northern tip of Scotland) in 1984, and walked to Land's End in England. On this journey, which he carried out with three other people, he pushed a wheelchair 1,000 miles (1,600 km) and raised £3,500 for The Forelands School for handicapped children. In 1983, he had already run 21 miles (34 km) around a 400-metre track to raise further money for The Forelands School for handicapped children, at Broadstairs in Kent.
==== Periplanone B ==== In 1979, Still reported the first total synthesis of periplanone B, the potent sex pheromone of the American cockroach. Although the structural connectivity of this compound had been established spectroscopically, Still's synthesis confirmed the relative stereochemical relationships present in this natural product. A key step in this synthesis makes use of an anionic oxy-Cope rearrangement to form the macrocyclic 10-membered ring found in periplanone B. In this transformation, the initial tertiary alcohol was treated with potassium hydride and 18-crown-6 at elevated temperature to induce the rearrangement, and the resulting enolate was trapped with chlorotrimethylsilane to form the macrocyclic silyl enol ether as a single diastereomer. This intermediate was then transformed into a key enone substrate over the course of five steps including Rubottom oxidation, TBS protection of the secondary alcohol, and formation of the exocyclic alkene via a selenoxide rearrangements.
For services to People with Autism and their Families. Anoushé Husain. Ambassador, Ehlers Danlos Support UK, LimbPower and Disability Champion. For services to People with Disabilities. Neil Rankin Hutchison. Lately Engineer, Roche Diagnostics. For services to Laboratory Engineering. Dorothy Jeanne Hyett. Regional Access and Bridleway Officer for Wales, British Horse Society. For services to Horse Riders and Horse Welfare. Helen Louise Hyndman. Service Coordinator, Ask Eve, The Eve Appeal. For charitable services to Women with Gynaecological Cancers. Lydia Anna Obat Ina. Foster Carer and Founder, Gapolunya Foundation. For services to Vulnerable Children. Kenneth Ince. Scout Leader, 1st Golborne (St Thomas) Scout Group. For services to Young People in the Metropolitan Borough of Wigan. Sheila Ince. Cub Scout Leader, 1st Golborne (St Thomas) Scout Group. For services to Young People in the Metropolitan Borough of Wigan. Hazel Irvine. Sports Presenter, Honorary President, Enable Scotland. For services to Sport and to Charity. Leslie John Raymond Irvine. International Referee Assessor, Irish Football Association. For services to Association Football. Azara Issifu. Independent Family Group Conference Coordinator, London Borough of Camden. For services to Children and Families, and to the community in the London Borough of Camden. Douglas Michael Jackson. For services to the community in Sheffield, South Yorkshire. Christine May Jackson. Headteacher, Glasllwch County Primary School, Newport. For services to Education. Sabit Jakupović.
== External links == Clinical Laboratory Improvement Amendments (CLIA), Centers for Medicare & Medicaid Services (CMS) CLIA Regulations Assessment Workgroup, CDC Clinical Laboratory Improvement Advisory Committee (CLIAC) CLIA Laboratory Lookup, CMS S&C's Quality, Certification and Oversight Reports (QCOR)
Sources: en.wikipedia.org
=== Potency === For equianalgesic dosing, when used sublingually, the potency of buprenorphine is about 40 to 70 times more potent than morphine. When used as a transdermal patch, the potency of buprenorphine may be 100 to 115 times greater than that of morphine.
==== Cisplatin-resistance ==== The drug paclitaxel may be useful in the treatment of cisplatin-resistant cancer. About 68.1% of cisplatin-resistant cells appear to be sensitive to paclitaxel and 66.7% of paclitaxel-resistant cells to cisplatin. The mechanism for this activity is unknown. Paclitaxel-based chemotherapy showed modest activity in SCLC patients refractory to both etoposide- and camptothecin-based chemotherapy. The newer agent lurbinectedin is active in relapsed SCLC and was approved for medical use in the United States in June 2020.
Fe3+ + 3 H2O → Fe(OH)3↓ + 3 H+ The iron(III) ion ("ferric iron") can also oxidize pyrite: FeS2(s) + 14 Fe3+ + 8 H2O → 15 Fe2+ + 2 SO2−4 + 16 H+ When iron(III) oxidation of pyrite occurs, the process can become rapid. pH values below zero have been measured in ARD produced by this process. ARD can also produce sulfuric acid at a slower rate, so that the acid neutralizing capacity (ANC) of the aquifer can neutralize the produced acid. In such cases, the total dissolved solids (TDS) concentration of the water can be increased from the dissolution of minerals from the acid-neutralization reaction with the minerals. Sulfuric acid is used as a defense by certain marine species, for example, the phaeophyte alga Desmarestia munda (order Desmarestiales) concentrates sulfuric acid in cell vacuoles.
== Symbols == A few symbols are in current use in botany. A number of others are obsolete; for example, Linnaeus used planetary symbols ⟨♂⟩ (Mars) for biennial plants, ⟨♃⟩ (Jupiter) for herbaceous perennials and ⟨♄⟩ (Saturn) for woody perennials, based on the planets' orbital periods of 2, 12 and 30 years; and Willd used ⟨♄⟩ (Saturn) for neuter in addition to ⟨☿⟩ (Mercury) for hermaphroditic. The following symbols are still used:
=== In amphibians === In some animals (such as the claw-toed frog Xenopus laevis) production of MSH is increased when the animal is in a dark location. This causes pigment to be dispersed in pigment cells in the toad's skin, making it become darker, and harder for predators to spot. The pigment cells are called melanophores and therefore, in amphibians, the hormone is often called melanophore-stimulating hormone.
Sources: en.wikipedia.org
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.
Research-grade purity indicates a supplier's measured percentage of the intended compound. It does not guarantee safety, sterility, or suitability for human consumption. Buyers should request a certificate of analysis with chromatograms and test methods.
Sports regulators prohibit SR9009 because it is a non-approved substance with potential performance-altering effects. Its presence can be detected in anti-doping testing. Athletes are responsible for substances found in their samples.
SR9009 is a synthetic REV-ERB agonist used in laboratory research. It is not an approved drug, and its effects in humans are not well characterized. It is often sold as a research chemical under the name Stenabolic.