This is a working overview of NR1D1, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-01-29 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.
Laboratory studies often administer SR9009 by injection because oral absorption appears poor in rodents. Reported pharmacokinetic properties include rapid metabolism and low systemic exposure after oral dosing. Human pharmacokinetic data are sparse, so absorption, distribution, metabolism, and excretion in people are not well defined. Some research explores related REV-ERB compounds with improved drug-like properties. Regulatory approval for any REV-ERB agonist as a human medicine has not been granted to date.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ, also called NR1D1 and NR1D2. These receptors help regulate circadian rhythms and metabolic gene programs. The compound was developed for laboratory research, not as an approved therapeutic. Its identity is distinct from steroid hormones and selective androgen receptor modulators. Scientific interest centers on how REV-ERB activation changes gene expression in cells and animal models.
| 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 |
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.
In spite of the political divisions, the four territories were strongly linked. Each was populated by European-African emigrants from the Cape; many citizens had relatives or friends in other territories. As the largest and oldest state in Southern Africa, the Cape was economically, culturally, and socially dominant; the population of Natal and the two Boer republics were mostly subsistence farmers. The fairly simple agricultural dynamic was upset in 1870, when vast diamond fields were discovered in Griqualand West, around modern-day Kimberley. Although the territory had historically come under the authority of the Orange Free State, the Cape government, with the assistance of the British government, annexed the area.
phosphate Any chemical species or functional group derived from phosphoric acid (H3PO4) by the removal of one or more protons (H+); the completely ionized form, [PO4]3−, consists of a single, central phosphorus atom covalently bonded to four oxygen atoms via three single bonds and one double bond. Phosphates are abundant and ubiquitous in biological systems, where they occur either as free anions in solution, known as inorganic phosphates and symbolized Pi, or bonded to organic molecules via ester bonds. The huge diversity of organophosphate compounds includes all nucleotides, whose phosphate groups are linked by phosphodiester bonds to form the structural backbones of long nucleotide chains such as DNA and RNA, and the high-energy diphosphate and triphosphate substituents of individual nucleotides such as ADP and ATP serve as essential energy carriers in all cells. Phospholipids are major components of most membranes. Enzymes known as kinases and phosphatases catalyze the addition and removal of phosphate groups to and from these and other biomolecules.
== Research == Flupirtine has been noted for its neuroprotective properties, and has been investigated for possible use in Creutzfeldt–Jakob disease, Alzheimer's disease, and multiple sclerosis. It has also been proposed as a possible treatment for Batten disease. Flupirtine underwent a clinical trial as a treatment for multiple sclerosis and fibromyalgia. Flupirtine showed promise for fibromyalgia due to its different action than the three approved by U.S. FDA drugs: pregabalin, milnacipran, and duloxetine. Additionally, there are case reports regarding flupirtine as a treatment for fibromyalgia. Adeona Pharmaceuticals (now called Synthetic Biologics) sub-licensed its patents for using flupirtine for fibromyalgia to Meda AB in May 2010.
Racemic crystallography is a technique used in structural biology where crystals of a protein molecule are developed from an equimolar mixture of an L-protein molecule of natural chirality and its D-protein mirror image. L-protein molecules consist of 'left-handed' L-amino acids and the achiral amino acid glycine, whereas the mirror image D-protein molecules consist of 'right-handed' D-amino acids and glycine. Typically, both the L-protein and the D-protein are prepared by total chemical synthesis.
Vaccination campaigns began in Porto Alegre on 20 January 2021. Starting in January, the municipal government began to not keep second doses of the vaccine, immediately using up all of the supplies that they received from the Programa Nacional de Imunizações (PNI). This created delays in second doses by the end of April and the beginning of May, when there was a further delay in the sending out of doses of CoronaVac throughout Brazil. Long lines formed as a result of people waiting for the vaccine, but there were not enough doses to go around, implying that there were people who were immunized during a period longer than the four weeks recommended by the manufacturers. Melo recorded a video, which was released on social media, apologizing to the populace for the delays and claiming that the Ministry of Health was responsible for the error. Upon receiving the supplies of the Pfizer/BioNTech vaccine, the municipal government decided to keep the shots to be able to give a second dose, to avoid the same issue that occurred with the CoronaVac vaccines. In March, the Consortium of the Association of Municipalities of the Porto Alegre Metropolitan Region (Granpal), integrated by Porto Alegre's city government, made a proposal to buy doses of the Sputnik V vaccine that would be meant for, by law, the PNI. The purchase, however, did not go forward.
Sources: en.wikipedia.org
=== First isolation and classification === Proteins were recognized as a distinct class of biological molecules in the eighteenth century by Antoine Fourcroy and others. Members of this class (called the "albuminoids", Eiweisskörper, or matières albuminoides) were recognized by their ability to coagulate or flocculate under various treatments such as heat or acid; well-known examples at the start of the nineteenth century included albumen from egg whites, blood serum albumin, fibrin, and wheat gluten. The similarity between the cooking of egg whites and the curdling of milk was recognized even in ancient times; for example, the name albumen for the egg-white protein was coined by Pliny the Elder from the Latin albus ovi (egg white). With the advice of Jöns Jakob Berzelius, the Dutch chemist Gerhardus Johannes Mulder carried out elemental analyses of common animal and plant proteins. To everyone's surprise, all proteins had nearly the same empirical formula, roughly C400H620N100O120 with individual sulfur and phosphorus atoms. Mulder published his findings in two papers (1837,1838) and hypothesized that there was one basic substance (Grundstoff) of proteins, and that it was synthesized by plants and absorbed from them by animals in digestion. Berzelius was an early proponent of this theory and proposed the name "protein" for this substance in a letter dated 10 July 1838
Robert Derek Channon (born 15 June 1944) is a British engineer known for inventing an insulin pump for diabetics, and miniaturized helicopters for the UK military. A diabetic himself, Channon developed the three ounce insulin pump to replace his own regular insulin injections. The National Medical Research Foundation awarded Channon £26,000 to develop the pump. In 1980, the National Medical Research Foundation awarded Guy's Hospital £40,000 to test Channon's pump in people with diabetes. The trial, under the supervision of Harry Keen, tested whether using the pump reduced the development of blindness in 30 people with diabetes. In July 2024 Channon was awarded an honorary Doctor of Engineering degree, by UWE Bristol, in recognition of his contribution to the management of type 1 diabetes.
The two substrates of this enzyme are glycerol and oxidised nicotinamide adenine dinucleotide phosphate (NADP+). Its products are D-glyceraldehyde, NADPH, and a proton. This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is glycerol:NADP+ oxidoreductase. This enzyme is also called glycerol dehydrogenase (NADP+). This enzyme participates in glycerolipid metabolism.
Jaw laxity that may make an individual's jaw open and close like a hinge, as well as open further than the average. Neck pain that can lead to chronic headaches and is usually associated with a crackling or grinding sensation (crepitus). The spine may end up in a "round back" or inversely may extend too much into hyperlordosis. Individuals may also experience scoliosis. Joints commonly associated with hypermobility (wrists, knees, ankles, elbows, shoulders) may be at more severe risk to dislocate or strain.
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.
SR9009 is a synthetic research compound that activates the REV-ERBα and REV-ERBβ nuclear receptors. It is not an approved drug and has no established human therapeutic use. Most published biological data come from cell and rodent studies.