NR1D1 comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2026-08-01. Where a claim depends on a specific study, the study is described rather than over-claimed.
Analytical methods for SR9009 typically rely on liquid chromatography coupled with tandem mass spectrometry. The technique can separate the parent compound from related substances and detect low concentrations in biological matrices. Urine and blood are common samples in anti-doping testing, while in vitro studies may use cell culture media. Rapid metabolism and low expected concentrations make method validation important for reliable identification. Exact metabolite patterns can vary by species and are not fully mapped.
Regulatory treatment of SR9009 reflects its investigational status. The compound has no approved human therapeutic indication, and sports authorities prohibit its use. It appears on anti-doping lists as a non-approved substance or metabolic modulator, depending on the list version. Products sold online as research chemicals are not quality-controlled medicines, so their identity and purity can differ from the label. Such products may also contain unlisted compounds, which complicates both testing and safety assessment.
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.
Analytical identification and purity assessment often use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Liquid chromatography–tandem mass spectrometry is used to detect and quantify SR9009 in biological matrices, including urine and blood, for anti-doping or pharmacokinetic studies. Nuclear magnetic resonance spectroscopy can confirm molecular structure. Stability depends on form and storage: the solid is generally more stable than solutions, and repeated freeze–thaw cycles may degrade samples. Purity is typically reported as a percentage from a certificate of analysis.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Not approved for human use | Investigational status in most countries |
| Sports status | Prohibited by WADA | Classified as non-approved or metabolic modulator |
| Common analytical method | LC-MS/MS | Used for trace detection in biological samples |
| Typical test matrices | Urine and blood | Sample choice depends on testing program |
| Human trial data | None published | Effects and safety are not established |
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.
At the molecular level, SR9009 binds REV-ERBα and REV-ERBβ and alters their repressive activity on target genes. These nuclear receptors help regulate the circadian clock, lipid synthesis, glucose metabolism, and inflammatory pathways. By changing transcription, the compound can shift the timing or magnitude of downstream metabolic processes in model systems. It does not act through androgen receptors or adenosine receptors, which distinguishes it from several substances sold for athletic performance. Whether the same transcriptional changes occur in humans at tolerable exposures remains an open question because controlled human studies are lacking.
At the molecular level, SR9009 binds the ligand-binding domain of REV-ERB and strengthens recruitment of corepressor proteins such as NCoR and HDAC3. This increases repression of target genes, including Bmal1 and other clock-controlled and metabolic genes. In rodent studies, such changes have been linked to altered lipid handling, glucose metabolism, and energy expenditure. The precise chain of events between receptor binding and whole-body effects remains an active area of research. Findings in animals do not automatically translate to humans.
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.
=== Discontinued === Alniditan (R-91274) – serotonin 5-HT1B and 5-HT1D receptor agonist – migraine [72] Avitriptan (BMS-180048) – serotonin 5-HT1B and 5-HT1D receptor agonist and triptan – migraine [73] Bezisterim (HE-3286; NE-3107; Triolex; 17α-ethynyl-5-androstene-3β,7β,17β-triol) – undefined mechanism of action (synthetic androstenetriol analogue and anti-inflammatory) – migraine [74] BI-44370 (BI44370) – calcitonin gene-related peptide receptor (CGRPR) antagonist – migraine [75] Botulinum toxin A topical (RT-001) – acetylcholine release inhibitor and neuromuscular blocking agent – migraine [76] Carisbamate (Comfyde; JNJ-10234094; RWJ-333369; YKP-509) – unknown mechanism of action – migraine [77] Dasolampanel (NGX-426) – ionotropic glutamate AMPA and kainate receptor antagonist – migraine [78] Dextromethorphan/quinidine (DXM/Q; AVP-923; Neurodex; Nuedexta; Zenvia) – combination of dextromethorphan (various actions) and quinidine (various actions) – migraine [79] Dihydroergocryptine (SRN-001) – non-selective monoamine receptor modulator and ergoline – migraine [80] Donitriptan (F-11356) – serotonin 5-HT1B and 5-HT1D receptor agonist and triptan – migraine [81] Dotarizine (Dotaricin; FI-6026) – calcium channel blocker and serotonin 5-HT1A, 5-HT2A, and 5-HT2C receptor antagonist – migraine [82] Dronabinol (Δ9-THC; Δ9-tetrahydrocannabinol; Deltanyne; Elevat; Marinol) – cannabinoid CB1 and CB2 receptor agonist – migraine [83] Ergotamine inhalation (Tempo-ergotamine) – non-selective monoamine receptor modulator and ergoline – migraine [84] Esprolol ((S)-ACC-9369) – beta blocker (β-adrenergic receptor antagonist) (amoxolol prodrug) – migraine [85] Ethinylestradiol/levonorgestrel (DP3; DR-103; DR-105; LoSeasonique; Seasonique) – combination of ethinylestradiol (an estrogen) and levonorgestrel (a progestogen) and a combined oral contraceptive – menstrual migraine [86] (S)-Ethylisothiouronium diethylphosphate (Difetur; MTR-104; MTR-105; MTR-106; MTR-107; MTR-108; Raviclust; Ravimig; Raviten) – nitric oxide synthase (NOS) inhibitor [87] Fremanezumab (Ajovy; LBR-101; PF-04427429; PF-4427429; RN-307; TEV-48125) – monoclonal antibody against calcitonin gene-related peptide (CGRP) – cluster headache, headache [88] Gabapentin (CI-945; Gabapen; GOE-3450; Neurontin) – gabapentinoid (α2δ subunit-containing voltage-gated calcium channel ligand) – migraine [89] Gabapentin enacarbil (1838262; ASP8825; GSK-1838262; Horizant; Regnite; Solzira; XP13512) – gabapentinoid (α2δ subunit-containing voltage-gated calcium channel ligand) – migraine [90] Ganaxolone (CCD-1042; Ztalmy) – GABAA receptor positive allosteric modulator and neurosteroid – migraine [91] HTL-0022562 (BHV-3100; HTL-22562) – calcitonin gene-related peptide receptor (CGRPR) antagonist – migraine [92] IS-159 – serotonin 5-HT1B and 5-HT1D receptor agonist – migraine [93] Lacosamide (ADD-234037; Erlosamide; Harkoseride; SPM-927; SPM-929; Vimpat; Vimpato) – various actions – migraine [94] Lanepitant (LY-303870) – neurokinin NK1 receptor antagonist – migraine [95] Lidocaine transdermal patch (ADL-87223; LidoPAIN) – sodium channel blocker – headache [96] Lornoxicam (Bosporon; Chlortenoxicam; HN-10000; RO-139297; Safem; TS-110; Xefo) – COX inhibitor/NSAID – migraine [97] LY-2300559 – metabotropic glutamate receptor 2 (mGluR2) positive allosteric modulator and cysteinyl leukotriene receptor 1 (CysLTR1) antagonist – migraine [98] LY-334370 – serotonin 5-HT1F receptor agonist and triptan – migraine [99] MEDI-0618 – monoclonal antibody against protease-activated receptor 2 (PAR2) – migraine [100] Olcegepant (BIBN-4096; BIBN-4096BS) – calcitonin gene-related peptide receptor (CGRPR) antagonist – migraine [101] Oxytocin (TI-001; TI-114; TNX-1900; TNX-2900) – oxytocin receptor agonist – migraine [102] Perampanel (E-2007; ER-155055-90; Fycompa) – AMPA receptor antagonist – migraine [103] PF-5180999 (PF-05180999) – phosphodiesterase PDE2 inhibitor – migraine [104] PNU-142633 (PNU-142633F) – serotonin 5-HT1D receptor agonist – cluster headache, headache, migraine [105] Prochlorperazine inhalation (AZ-001) – typical antipsychotic (non-selective monoamine receptor modulator) – migraine [106] Propisergide (ergalgin) – serotonin receptor modulator and ergoline – migraine Propofol phosphate (Neuprox; propofol prodrug) – GABAA receptor positive allosteric modulator (propofol prodrug) – migraine [107] Research programme: migraine therapy - Orexo (OX-40; OX641) – undefined mechanism of action – migraine [108] Selurampanel (BGG-492; BGG-492A) – ionotropic glutamate AMPA and kainate receptor antagonist – migraine [109] Sergolexole (LY-281067) – serotonin 5-HT2 receptor antagonist and ergoline – migraine [110] Telcagepant (MK-0974) – calcitonin gene-related peptide receptor (CGRPR) antagonist – migraine [111] Tezampanel (LY-293558; NGX-424; PRN-001-01) – ionotropic glutamate AMPA and kainate receptor antagonist – migraine [112] Tizanidine (AN-021A; AN-021; DS-103282; Sirdalud; Ternelin; Zanaflex) – α2-adrenergic receptor agonist – migraine [113] Tonabersat (SB-220453; USL-260; Xiflam) – connexin 43 (GJA1) inhibitor – migraine [114] Zolmitriptan inhalation (CVT-427) – serotonin 5-HT1B and 5-HT1D receptor agonist and triptan – migraine [115] Zonisamide (AD-810; CI-912; Excegran; Kinaplase; PD-110843; Tremode; Trerief; Zonegran) – calcium channel blocker, sodium channel blocker, and other actions – migraine [116]
In more recent years, writers active in the city are Giovanni Arpino, Nico Orengo, Giuseppe Culicchia, Margherita Oggero, Laura Mancinelli, Alessandra Montrucchio, Alessandro Perissinotto, Guido Quartz, Piero Soria and Alessandro Baricco. Baricco was also among the founders of the Scuola Holden, dedicated to writing techniques teaching. There is also a literary tradition in the local Piedmontese language, including authors such as Nicoletto da Torino, Ignas Isler (author of epic poems), and Eduard Calv.
Both his parents died from cancer during his first two years at Cambridge. His father was 60 and his mother was 58. As an undergraduate Sanger's beliefs were strongly influenced by his Quaker upbringing. He was a pacifist and a member of the Peace Pledge Union. It was through his involvement with the Cambridge Scientists' Anti-War Group that he met his future wife, Joan Howe, who was studying economics at Newnham College. They courted while he was studying for his Part II exams and married after he had graduated in December 1940. Sanger, although brought up and influenced by his religious upbringing, later began to lose sight of his Quaker related ways. He began to see the world through a more scientific lens, and with the growth of his research and scientific development he slowly drifted farther from the faith he grew up with. He had nothing but respect for the religious and states he took two things from it, truth and respect for all life. Under the Military Training Act 1939 he was provisionally registered as a conscientious objector, and again under the National Service (Armed Forces) Act 1939, before being granted unconditional exemption from military service by a tribunal. In the meantime he undertook training in social relief work at the Quaker centre, Spicelands, Devon and served briefly as a hospital orderly. Sanger began studying for a PhD in October 1940 under N.W. "Bill" Pirie. His project was to investigate whether edible protein could be obtained from grass. After little more than a month Pirie left the department and Albert Neuberger became his adviser.
Sources: en.wikipedia.org
== Research == There is currently a great deal of research being conducted on hemostasis. The most current research is based on genetic factors of hemostasis and how it can be altered to reduce the cause of genetic disorders that alter the natural process hemostasis. Von Willebrand disease is associated with a defect in the ability of the body to create the platelet plug and the fibrin mesh that ultimately stops the bleeding. New research is concluding that the von Willebrand disease is much more common in adolescence. This disease negatively hinders the natural process of Hemostasis causing excessive bleeding to be a concern in patients with this disease. There are complex treatments that can be done including a combination of therapies, estrogen-progesterone preparations, desmopressin, and Von Willebrand factor concentrates. Current research is trying to find better ways to deal with this disease; however, much more research is needed in order to find out the effectiveness of the current treatments and if there are more operative ways to treat this disease.
The three substrates of this enzyme are saccharopine, oxidised nicotinamide adenine dinucleotide phosphate (NADP+), and water. Its products are L-lysine, α-ketoglutaric acid, reduced NADPH, and a proton. This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-NH group of donors with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is N6-(L-1,3-dicarboxypropyl)-L-lysine:NADP+ oxidoreductase (L-lysine-forming). Other names in common use include lysine-2-oxoglutarate reductase, lysine-ketoglutarate reductase, L-lysine-alpha-ketoglutarate reductase, lysine:alpha-ketoglutarate:TPNH oxidoreductase, (epsilon-N-[gultaryl-2]-L-lysine forming), saccharopine (nicotinamide adenine dinucleotide phosphate,, lysine-forming) dehydrogenase, 6-N-(L-1,3-dicarboxypropyl)-L-lysine:NADP+ oxidoreductase, and (L-lysine-forming). This enzyme participates in lysine biosynthesis and lysine degradation.
After Piłsudski's death in 1935, Poland was governed until (and initially during) the German invasion of 1939 by old allies and subordinates known as "Piłsudski's colonels". They had neither the vision nor the resources to cope with the perilous situation facing Poland in the late 1930s. The colonels had gradually assumed greater powers during Piłsudski's life by manipulating the ailing marshal behind the scenes. Eventually they achieved an overt politicization of the army that did nothing to help prepare the country for war.
Sources: en.wikipedia.org
Also in 2021, McLain performed the role of Thelma (or Mama) in a livestreamed version of the play 'night, Mother co-starring Sheila Houlahan on the online platform Twitch with the story adapted by McLain within the context of the COVID-19 pandemic. The filmed online play, directed by McLain's husband John Patrick Lowrie, is performed through an online face-to-face chat with the screen split between McLain's and Houlahan's screens, occasionally interrupted by cuts to pre-filmed footage relevant to the story. In 2022, McLain provided the voice of GLaDOS for the GEICO insurance ad.
However those who drink 2–4 cups per day may be at a slightly increased risk. Caffeine increases intraocular pressure in those with glaucoma but does not appear to affect normal individuals. It may protect people from liver cirrhosis. There is no evidence that coffee stunts a child's growth. Caffeine may increase the effectiveness of some medications including ones used to treat headaches. Caffeine may lessen the severity of acute mountain sickness if taken a few hours prior to attaining a high altitude.
Nicotine is a stimulant and alkaloid found primarily in plants of the nightshade family, notably in tobacco; it is also synthesized. Nicotine is used recreationally for its stimulant and anxiolytic effects. In tobacco leaves, nicotine constitutes about 0.6–3% of the dry weight, and smaller, trace quantities occur in other Solanaceae crops such as tomatoes, potatoes, and eggplants. In pure form, nicotine is a colorless to yellowish, oily liquid that readily penetrates biological membranes and acts as a potent neurotoxin in insects, where it serves as an antiherbivore toxin. Historically, it was widely used as an insecticide, and its structure provided the basis for synthetic neonicotinoid pesticides. In humans, nicotine acts primarily as a stimulant by binding to and activating nicotinic acetylcholine receptors (nAChRs) in the central nervous system and peripheral tissues. This results in the release of neurotransmitters such as dopamine, acetylcholine, and norepinephrine, producing effects including increased alertness, reduced anxiety, and mild euphoria. Nicotine is typically consumed through tobacco smoking, vaping, or other nicotine delivery systems. An average cigarette yields about 2 mg of absorbed nicotine, a dose sufficient to produce reinforcement and dependence while remaining far below toxic levels. Nicotine is highly addictive, and nicotine dependence is characterized by tolerance, physical dependence, psychological dependence, and nicotine withdrawal symptoms such as irritability, anxiety, and difficulty concentrating.
Film laboratories or darkrooms Clandestine labs for the production of illegal drugs Computer labs Crime labs used to process crime scene evidence Language labs Medical labs (involves handling of chemical compounds) Public health labs Cleanrooms
Sources: en.wikipedia.org
No. It is an investigational compound without approved therapeutic indications. It is sold for research purposes only in many jurisdictions.
Sports authorities prohibit it because it is not approved for human use and has potential performance-enhancing effects. It appears on anti-doping lists under non-approved or metabolic modulator categories.
Detection usually uses liquid chromatography-tandem mass spectrometry. The method targets the parent compound or its metabolites in urine or blood.
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.