This is a working overview of nuclear receptor, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2025-10-14 and is reviewed periodically as new material appears.
Storage conditions for research-grade SR9009 generally involve a freezer at approximately minus twenty degrees Celsius, sometimes lower for long-term preservation. Containers should remain tightly closed and protected from light. Desiccants may be used to limit moisture uptake. Solutions are often stored in aliquots to avoid repeated warming and cooling. Stability data for the compound under various conditions are limited, so laboratories typically follow supplier recommendations and verify performance through periodic analytical checks rather than assuming indefinite stability.
Identity and purity testing for SR9009 commonly uses liquid chromatography coupled with tandem mass spectrometry. This method separates the compound from matrix components and detects it by mass-to-charge transitions, providing sensitive and specific confirmation. Nuclear magnetic resonance spectroscopy can support structural identification, while high-performance liquid chromatography with ultraviolet detection may estimate purity. Because online products labeled as SR9009 may contain other substances or no active compound at all, independent verification is important in research settings. Certificates of analysis are useful but not a substitute for in-house testing.
Laboratory samples of SR9009 are typically supplied as a white to off-white powder. The compound dissolves readily in organic solvents such as dimethyl sulfoxide and ethanol, while its solubility in water is low. Because of this solubility profile, researchers often prepare concentrated stock solutions in an organic solvent before diluting them into aqueous assay buffers. Light exposure, moisture, and repeated freeze-thaw cycles can degrade many small molecules, so handling procedures usually aim to minimize these factors. Purity is commonly checked before 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.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Typical for research-grade material |
| Solubility | Soluble in DMSO and ethanol; low aqueous solubility | Organic stock solutions are common |
| Typical storage temperature | -20 °C or lower | Protect from light and moisture |
| Common analytical method | LC-MS/MS | Used for detection and confirmation |
| Common synonyms | SR9009; Stenabolic | Stenabolic is an informal name |
SR9009 is generally described as poorly soluble in water and more soluble in organic solvents such as dimethyl sulfoxide and ethanol. Stock solutions are commonly prepared in an organic solvent before dilution into an aqueous buffer or vehicle. Precipitation can occur if the organic fraction is reduced too quickly or if the final concentration exceeds the compound's solubility limit. Sonication or gentle warming may aid dissolution in some protocols, but excessive heat can promote degradation. Container material and pH can also influence observed solubility.
For long-term storage, SR9009 is typically kept as a solid at low temperature, protected from moisture and light. Desiccated conditions limit hydrolysis, while opaque containers reduce photochemical breakdown. Solutions are less stable than solids and are often stored frozen in aliquots to avoid repeated freeze-thaw cycles. Stability data are not standardized across all suppliers, so users should rely on certificate-of-analysis information when available. Degradation may appear as color change, precipitate, or decreased chromatographic purity.
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.
Regulatory and sporting contexts treat SR9009 as a prohibited substance in many elite competitions. Its presence on banned lists reflects concerns about performance enhancement and unknown long-term safety. Analytical chemists have developed methods to detect the parent compound and its metabolites in urine and blood. Literature discussions distinguish between in vitro potency, animal pharmacology, and anecdotal human reports. The latter are difficult to verify because products sold online may lack purity or contain different compounds.
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.
PAHs may be abundant in the universe. They seem to have been formed as early as a couple of billion years after the Big Bang, and are associated with new stars and exoplanets. More than 20% of the carbon in the universe may be associated with PAHs. PAHs are considered possible starting material for the earliest forms of life. Light emitted by the Red Rectangle Nebula possesses spectral signatures that suggest the presence of anthracene and pyrene. This report was considered a controversial hypothesis that as nebulae of the same type as the Red Rectangle approach the ends of their lives, convection currents cause carbon and hydrogen in the nebulae's cores to get caught in stellar winds, and radiate outward. As they cool, the atoms supposedly bond to each other in various ways and eventually form particles of a million or more atoms. Adolf Witt and his team inferred that PAHs—which may have been vital in the formation of early life on Earth—can only originate in nebulae.
On 18 July, amid the large-scale attack by Bedouin fighters on Suwayda Governorate and reports of them entering Suwayda city, backed by fighters from the neighboring Daraa Governorate and other governorates in Syria, Hikmat al-Hijri reportedly demanded the Syrian government to send a conflict resolution force. Reports later circulated that Syrian government forces were preparing to redeploy in the city of Suwayda, following renewed clashes between Druze factions and Bedouin tribes. While an Israeli government related source said that Israel had agreed to a time-limited entry into Suwayda by Syrian government forces, the Syrian Interior Ministry denied that it was preparing to re-enter the city. On 19 July, the Syrian government declared a ceasefire which was approved by the Druze leadership and Bedouin tribes. They arrived at the city of Suwayda but are having difficulty implementing the ceasefire. Fierce street fighting was documented in the city of Suwayda between Bedouins and Druze. AFP, which had teams on the ground, reported that the Bedouin militants had managed to break through the Druze defenses and penetrate the west of the city. An AFP correspondent in Suwayda reported seeing dozens of houses and cars set on fire, and gunmen setting shops on fire after looting them. On 20 July, clashes were reported after the ceasefire in the towns of Al-Ariqah, Rimah, Hazem and Shahba, after an attack by tribal militias, especially in Al-Ariqah after the entry of tribal fighters with the help of General Security Service.
In May 2016, Theranos announced that it had voided two years of results from its Edison device. The company announced that about 1% of test results had been voided or corrected from its proprietary machines in June 2016. Within two weeks, Walgreens formally terminated its partnership with Theranos and would close all remaining Theranos wellness centers. In August 2016, the company withdrew its request for emergency clearance of a Zika virus blood test after a lack of essential safeguards during the testing process was found by federal inspectors. Theranos announced that it would close its laboratory operations and wellness centers and lay off about 40% of its workforce to work on miniature medical testing machines in October 2016. In January 2017, Theranos announced that it had laid off a further 41% of its workforce, or approximately 155 people, and closed the last remaining blood-testing facility after the lab failed a second major U.S. regulatory inspection. Also that month, the company faced lawsuits from several different entities including Walgreens and Arizona Attorney General Mark Brnovich. In April 2017, lawyers for Partner Investments LP and two other funds, with combined stakes totaling more than $96 million in Theranos preferred shares, charged that Theranos had threatened to seek bankruptcy protection if the investors did not agree to accept additional stock equity in lieu of litigation. Theranos officials said the funds had mischaracterized the exchange offer, which was discussed before the suit was filed.
== Materials science == Materials science has applied the techniques of combinatorial chemistry to the discovery of new materials. This work was pioneered by P.G. Schultz et al. in the mid-nineties in the context of luminescent materials obtained by co-deposition of elements on a silicon substrate. His work was preceded by J. J. Hanak in 1970 but the computer and robotics tools were not available for the method to spread at the time. Work has been continued by several academic groups as well as companies with large research and development programs (Symyx Technologies, GE, Dow Chemical etc.). The technique has been used extensively for catalysis, coatings, electronics, and many other fields. The application of appropriate informatics tools is critical to handle, administer, and store the vast volumes of data produced. New types of design of experiments methods have also been developed to efficiently address the large experimental spaces that can be tackled using combinatorial methods.
==== Concerns ==== Numerous scholars and regulatory bodies have raised concerns over the safety profile of such products. One group of scholars argue that organic solvents introduce compounds into the standardized product that may affect the liver; these compounds are not extracted by water and are consequently largely absent from kava prepared with water. For instance, when compared with water extraction, organic solvents extract vastly larger amounts of flavokavains, compounds associated with adverse reactions to kava that are present in very low concentrations in noble kava, but significant in non-noble. They also point out that chemical solvents and water extract different compounds, and "[t]he extraction process may exclude important modifying constituents soluble only in water". In particular, it has been noted that, unlike traditional water-based preparations, products obtained with the use of organic solvents do not contain glutathione, an important liver-protecting compound. Another group of researchers noted that "the extraction process (aqueous vs. acetone in the two types of preparations) is responsible for the difference in toxicity as extraction of glutathione in addition to the kava lactones is important to provide protection against hepatotoxicity." It has also been argued that kavalactone extracts are often made from low-quality plant material, including the toxic aerial parts of the plant that contain the hepatotoxic alkaloid pipermethystine, non-noble kava varieties, or plants affected by mold.
Sources: en.wikipedia.org
In 2015, Duterte made homophobic remarks about United States ambassador Philipp Goldberg after Secretary of State John Kerry visited the Philippines. Duterte's record on human rights and his long history of comments that have widely been considered to be offensive, provocative, threatening, and undiplomatic have received sharp international criticism. He has been portrayed by his critics in the media as having a "dirty mouth". He had, however, promised to behave in a "prim and proper" manner on the national and international stage once he was to be inaugurated as president, to the point that, "almost, I would become holy." Throughout his presidency, Duterte has made controversial comments about rape, human rights, his views on media killings, and has used slurs; he has also made controversial statements to international leaders and institutions. He has also repeatedly criticized the Catholic Church which has expressed alarm over deaths linked to the war on drugs. Human Rights Watch (HRW) called the first year of Duterte in office a "human rights calamity". HRW estimates that there have been 7,000 deaths from the day Duterte first took office to January 2017. The Duterte administration suspended the drug war in February 2017 in an effort to cleanse the police ranks of supposed corruption, also halting the disclosure of figures on deaths related to drug arrests and raids. In March 2017, HRW released a special investigation and report on the state of police related shooting, titled "License To Kill".
== Operations == Glenmark operates manufacturing facilities in India, the United States, Argentina, and the Czech Republic. Its oldest plant, in Maharashtra, opened in 1983. Other Indian sites are in Himachal Pradesh, Goa, Madhya Pradesh, and Sikkim. The company also runs a facility in Pilar, Argentina, focused on oncology injectables, and a plant in the Czech Republic acquired through the 2007 purchase of Medicamenta. U.S. corporate offices are in Elmwood Park, New Jersey. The Monroe, North Carolina plant, opened in 2018, is Glenmark's sole U.S. manufacturing site. In August 2021 the company recalled all products made there. The FDA identified 17 manufacturing deficiencies and issued a warning letter in 2022. After corrective actions, a December 2025 inspection was classified as Voluntary Action Indicated, allowing manufacturing to resume. Several Indian facilities have also drawn FDA citations. Good manufacturing practice violations brought a warning letter to the Himachal Pradesh plant in October 2019. The Goa facility was cited in November 2022 for inadequate procedures to verify product strength and purity. A July 2025 warning letter cited the Madhya Pradesh plant for deficiencies in cleaning and testing procedures.
=== Breast cancer === Breast cell proliferation has been found to be significantly increased by the combination of an oral estrogen plus cyclic medroxyprogesterone acetate in postmenopausal women but not by the combination of transdermal estradiol plus oral progesterone. Studies of topical estradiol and progesterone applied to the breasts for 2 weeks have been found to result in highly pharmacological local levels of estradiol and progesterone. These studies have assessed breast proliferation markers and have found increased proliferation with estradiol alone, decreased proliferation with progesterone, and no change in proliferation with estradiol and progesterone combined. In the Postmenopausal Estrogen/Progestin Interventions (PEPI) trial, the combination of estrogen and cyclic oral progesterone resulted in a higher mammographic breast density than estrogen alone (3.1% vs. 0.9%) but a non-significantly lower breast density than the combination of estrogen and cyclic or continuous medroxyprogesterone acetate (3.1% vs. 4.4–4.6%). Higher breast density is a strong known risk factor for breast cancer. Other studies have had mixed findings however. A 2018 systematic review reported that breast density with an estrogen plus oral progesterone was significantly increased in three studies and unchanged in two studies. Changes in breast density with progesterone appear to be less than with the compared progestins.
==== Transcription ==== H-DNA forming sequences can also cause genetic instability by interfering with and stopping transcription prematurely. The DNA unwinding involved in transcription makes it more susceptible to damage. In transcription-coupled repair (TCR), a lesion on the template strand of DNA stops the function of RNA polymerase and signals TCR factors to resolve the damage by excising it. H-DNA can be perceived as one of these lesions. A study observing transcription by T7 RNA polymerase on a stable H-DNA-forming sequence analog found transcription blockage at the duplex-to-triplex junction. Here, the template strand was the central strand of the H-DNA, and the difficulty of disrupting its Watson-Crick and Hoogsteen hydrogen bonds stopped transcription from progressing. When transcription by T7 was observed on the P0 promoter of the c-MYC gene, the shortened transcription products that were found indicated that transcription was stopped in close proximity to the H-DNA forming sequence downstream of the promoter. Formation of H-DNA in this region prevents T7 from traveling down the template strand because of the steric hindrance it causes. This stops transcription and signals for TCR factors to come resolve the H-DNA, which results in DNA excision that can cause genetic instability. The mirror symmetry and prevalence of guanine residues in the c-MYC gene gives it a high propensity for non-canonical DNA structure formation.
Sources: en.wikipedia.org
Research-grade SR9009 is typically stored frozen at about minus twenty degrees Celsius, protected from light and moisture. Stock solutions are often kept in aliquots to avoid repeated freeze-thaw cycles. Specific storage conditions should follow the supplier's documentation.
Liquid chromatography with tandem mass spectrometry is widely used to detect and confirm SR9009 in laboratory samples. The technique offers high sensitivity and can distinguish the target compound from related substances. Nuclear magnetic resonance and ultraviolet detection may support identity and purity checks.
Online products labeled as SR9009 may vary in identity, purity, and actual content. Independent testing helps confirm that a sample matches its label and does not contain unexpected contaminants. This is important for reproducible research and for interpreting experimental results.
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.