This is a working overview of LC-MS, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2026-06-05. Anything still debated is marked as such rather than presented as settled.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. These receptors help regulate circadian rhythms, lipid metabolism, and inflammatory gene expression. In cell and animal experiments, SR9009 alters transcription of clock-controlled genes and metabolic pathways. The compound is not a hormone and does not resemble classical steroid structures. Its activity depends on binding to the ligand-binding domain of REV-ERB, where it can modify corepressor recruitment.
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 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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Binds REV-ERBα and REV-ERBβ in preclinical models |
| Molecular formula | C20H24ClN3O4S | Reported for the parent compound |
| CAS Registry Number | 1379686-30-2 | Common identifier in chemical databases |
| Appearance | Off-white to pale yellow solid | Typical research chemical solid |
| Solubility | Soluble in DMSO and ethanol; low in water | Class: small organic molecule |
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.
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.
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 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.
=== Music === V.I.P. (Hungarian band), a defunct pop boy group The V.I.P.'s (band), an English band of the 1960s Voices in Public, a Canadian boy group VVIP (hip-hop group), a Ghanaian hiplife band, formerly known as VIP (or Vision In Progress) V.I.P. (album), a 2000 album by Jungle Brothers, or the title track "V.I.P." (Bro'Sis song) (2003) "V.I.P" (Ice Prince song) (2013) "V.I.P" (Sid song) (2013) "VIP" (Aya Nakamura song) (2022) V.I.P., a subsidiary label of Motown Records VIP Music Records, an American record label based in New York City (founded 2004) VIP Records, a record store chain from Los Angeles, California (founded 1967) "VIP", a song by Kesha from Animal (Kesha album) The V.I.P. (The Vanilla Ice Posse), the rapper's DJs and backup dancers Victory in Praise Music and Arts Seminar Mass Choir, an organization founded by John P. Kee "V.I.P.", a song by Françoise Hardy "V.I.P.", a song by R. Kelly from R. (R. Kelly album) V.V.I.P, a 2011 EP by Seungri V.I.P. – Very Important Pony, 2025 EP by HorsegiirL
Administration: Administers the Secretariat as well as looks after personal matters of the Chairman/Members and other Officers/Staff of the commission. All India Services: Recruitment to All India Services is done either by direct recruitment, through Civil Services Examination or by promotion from the State Service. The AIS Branch handles the promotions of State Service officers to the IAS, IPS and IFS. It also handles policy matters relating to All India Services and amendments in the 'Promotion Regulations' of respective services. Appointments: It carries out appointments to central services based on Promotion (based on proposals from various Ministries/Departments/Union Territories and from certain local bodies) and by the means of Deputation and Absorption. Examinations: It carries out merit-based selection and recommendation of candidates through various examinations such as the Engineering Services Examination, Combined Medical Services Examination, Defence Services Examination, Civil Services Examination, etc., to Group A and Group B Services of the Government of India. General: Primarily deals with day-to-day housekeeping work for the Commission, such as arrangements and facilitation for the conduct of Examinations by the UPSC, printing the Annual Report, etc.
=== Isoniazid === Isoniazide (INH) is one of the most commonly used drugs for tuberculosis; it is associated with mild elevation of liver enzymes in up to 20% of patients and severe hepatotoxicity in 1-2% of patients.
==== Hypothetical origin ==== The top half of tRNA (consisting of the T arm and the acceptor stem with 5′-terminal phosphate group and 3′-terminal CCA group) and the bottom half (consisting of the D arm and the anticodon arm) are independent units in structure as well as in function. The top half may have evolved first including the 3′-terminal genomic tag which originally may have marked tRNA-like molecules for replication in early RNA world. The bottom half may have evolved later as an expansion, e.g. as protein synthesis started in RNA world and turned it into a ribonucleoprotein world (RNP world). This proposed scenario is called genomic tag hypothesis. In fact, tRNA and tRNA-like aggregates have an important catalytic influence (i.e., as ribozymes) on replication still today. These roles may be regarded as 'molecular (or chemical) fossils' of RNA world. In March 2021, researchers reported evidence suggesting that an early form of transfer RNA could have been a replicator ribozyme molecule in the very early development of life, or abiogenesis. Evolution of type I and type II tRNAs is explained to the last nucleotide by the three 31 nucleotide minihelix tRNA evolution theorem, which also describes the pre-life to life transition on Earth. Three 31 nucleotide minihelices of known sequence were ligated in pre-life to generate a 93 nucleotide tRNA precursor.
Sources: en.wikipedia.org
=== Non-covalent conjugation === Although covalent conjugation has been the dominant strategy for constructing polymer-protein hybrids, noncovalent chemistry can add another level of complexity and provides the opportunity to create higher-ordered structures. Specifically, self-assembly by non-covalent interactions is progressing rapidly. Supramolecular self-assembly can create nanoparticles, vesicles/micelles, protein cages, etc. Metal-binding interactions, host-guest, and boronic acid-based chemistries are widely studied as non-covalent conjugation methods to create polymer-protein hybrids.
==== Discovery of the Redfield relaxation theory and equation ==== Redfield's original article published in the IBM Journal in 1957, and then in the first issue of Advanced Magnetic Resonance in 1965, "The Theory of Relaxation Processes" explained observations that molecules excited with RF in a magnetic field did not relax as expected in terms of classical thermodynamics but could be explained in terms of quantum physics, yielding a semi-classic explanation of nuclear spin in metals. The theory continues to be useful not only in NMR but in optics and computational quantum mechanics as well. The theory streamlined analysis of atomic relationships and explained observations that NMR scientists had not fully theorized. The theory helped explain spin temperature, rotating frame, nuclear spin relaxation, and predicted adiabatic demagnetization and remagnetization in a spin-locked state, and short correlation time.
Specially marked by cunning, despising their own inheritance in the hope of winning a greater, eager after both gain and dominion, given to imitation of all kinds, holding a certain mean between lavishness and greediness, that is, perhaps uniting, as they certainly did, these two seemingly opposite qualities. Their chief men were specially lavish through their desire of good report. They were, moreover, a race skillful in flattery, given to the study of eloquence, so that the very boys were orators, a race altogether unbridled unless held firmly down by the yoke of justice. They were enduring of toil, hunger, and cold whenever fortune laid it on them, given to hunting and hawking, delighting in the pleasure of horses, and of all the weapons and garb of war. Medieval Latin documents referred to them as Nortmanni, which means "men of the North". This name provides the etymological basis for the modern words "Norman" and "Normandy", with -ia (Normandia, like Neustria, Francia, etc.). After 911, this name replaced the term Neustria, which had formerly been used to describe the region that included Normandy. Today, nordmann (Norwegian pronunciation: ['nuɾmɑn]) in the Norwegian language denotes a Norwegian person. In the Swedish language the word for the Norwegian person is norrman.
Sources: en.wikipedia.org
However, later research showed that the human MHC IIb was in fact IIx, indicating that the IIB is better named IIX. IIb is expressed in other mammals, so is still accurately seen (along with IIB) in the literature. Non human fiber types include true IIb fibers, IIc, IId, etc.
==== APCI MS ==== The source for APCI is similar to ESI except that ions are formed by the interaction of the heated analyte solvent with a corona discharge needle set at a high electrical potential. Primary ions are formed immediately surrounding the needle, and these interact with the solvent to form secondary ions that ultimately ionize the sample. APCI is particularly useful for the analysis of nonpolar lipids such as triacylglycerols, sterols, and fatty acid esters.
=== „Ayda, Bär und Hase“ (2017) === The children's book „Ayda, Bär und Hase“ [Ayda, Bear and Rabbit] revisits the father-daughter relationship motif from the Neil Young book. The father, called Bâbâ, resembles other protagonists in Kermani's books (and the author himself): he has Iranian parents, lives in Cologne, and is a fan of the soccer team 1. FC Cologne and of Neil Young. The focus, however, is now on his five-year-old daughter Ayda, who is ill at ease with her small stature and befriends a bear and a rabbit who can talk. The book’s central themes include multicultural tolerance, the insight “that you can be happy even if not everything is perfect,” and overcoming fears together.
=== Metabolic panel === A Metabolic Panel (MP) is a routine group of blood tests commonly used for health screenings, disease detection, and monitoring vital signs of hospitalized patients with specific medical conditions. MP panel analyzes common analytes in the blood to assess the functions of the kidneys and liver, as well as electrolyte and acid-base balances. There are two types of MPs - Basic Metabolic Panel (BMP) or Comprehensive Metabolic Panel (CMP).
Sources: en.wikipedia.org
SR9009 is a synthetic small molecule studied as an agonist of the REV-ERB nuclear receptors. It is not an approved medicine, and its effects in humans are not well characterized.
No. It is a synthetic ligand that binds nuclear receptors, not a steroid or peptide hormone. Its activity depends on receptor binding rather than endocrine secretion.
Clinical evidence is limited. Most published data come from cell and animal experiments. Human safety and efficacy remain uncertain.
Legality depends on the country and the intended use. In many places it is not approved as a medicine and may be sold only as a research chemical. Importation or possession can be restricted, and sports organizations prohibit it.