List of modafinil analogues and derivatives explained
This page lists chemical compounds similar to modafinil, known as modafinil analogues and derivatives. These are structural analogues and derivatives of modafinil, a drug that affects dopamine levels in the brain in an unusual way (atypical dopamine reuptake inhibitor or DRI). Modafinil is a drug that helps keep people awake and alert (wakefulness-promoting agent or "eugeroic").[1]
Most of the listed modafinil analogues are drugs that specifically target dopamine reuptake (reabsorption of a neurotransmitter by a neurotransmitter transporter) with stronger effects (selective DRIs with improved potency) compared to modafinil. The modafinil analogues are of interest in the potential treatment of a condition involving the misuse of stimulant drugs (psychostimulant use disorder or PSUD), as drugs that help increase motivation (pro-motivational agents) to treat motivational disorders,[2] [3] and for treatment of neurodegenerative diseases such as Alzheimer's disease.[4] [5] [6] [7]
Modafinil analogues acting as DRIs include both drugs similar to modafinil that affect dopamine without causing stimulant effects (atypical modafinil-like non-psychostimulant DRIs) such as flmodafinil and JJC8-016 and drugs that affect dopamine in a way similar to cocaine (classical or typical cocaine-like DRIs) such as JJC8-088. Besides their potential medical use, modafinil analogues, including adrafinil, flmodafinil, fladrafinil, and modafiendz, are also sold online as substances that are believed to improve cognitive functions such as memory and focus (nootropics or "cognitive enhancers").
A limitation of some modafinil analogues such as JJC8-016 is blocking a specific protein (hERG) that can lead to heart problems (potent inhibition of the hERG antitarget and predicted cardiotoxicity).[8] [9] [10]
List of modafinil analogues and derivatives
- Adrafinil (Olmifon, CRL-40028, N-hydroxymodafinil) – prodrug of modafinil[11]
- CE-103 – DRI[12] [13]
- CE-111 – DRI[14]
- CE-123 (or as (S)-CE-123) – DRI[15] [16] [17]
- CE-125 – DRI[18]
- CE-158 (or as (S,S)-CE-158) – DRI[19] [20]
- Cinfenine – abandoned antidepressant and coronary vasodilator (similar in structure to JJC8-016)[21] [22]
- CT-005094 (CT-0050904) – atypical DRI[23] [24]
- CT-005404 (CT-5404) – atypical DRI[25] [26]
- Fladrafinil (CRL-40941, fluorafinil, bisfluoroadrafinil) – modafinil-like agent, little-characterized (but possible prodrug of flmodafinil)
- Flmodafinil (CRL-40940, NLS-4, JBG01-41, bisfluoromodafinil, lauflumide) – atypical DRI[27] [28] [29] [30]
- GC03-04 – DRI[32]
- GC04-38 – DRI
- JJC8-016 – poorly selective atypical DRI
- JJC8-087 – DRI[33]
- JJC8-088 – classical/typical or cocaine-like DRI
- JJC8-089 – DRI
- JJC8-091 – atypical DRI
- (S)-MK-26 – atypical DRI[34] [35]
- Modafiendz (methylbisfluoromodafinil) – modafinil-like agent, little-characterized[36] [37]
- Modafinil (Provigil, Alertec, Modavigil, CRL-40476) – atypical DRI, other actions
- Modafinil acid (modafinilic acid, CRL-40467) – inactive metabolite of modafinil[40]
- Modafinil sulfone (CRL-41056) – metabolite of modafinil with anticonvulsant effects but otherwise inactive
- RDS03-94 (RDS3-094) – atypical DRI[41]
- RDS04-010 (RDS04-10, RDS4-010) – DRI[42] [43]
In addition to the above, further modafinil analogues have also been described.[44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] [55] [56]
Notes and References
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- Hersey M, Bacon AK, Bailey LG, Coggiano MA, Newman AH, Leggio L, Tanda G . Psychostimulant Use Disorder, an Unmet Therapeutic Goal: Can Modafinil Narrow the Gap? . Front Neurosci . 15 . 656475 . 2021 . 34121988 . 8187604 . 10.3389/fnins.2021.656475 . free .
- Newman AH, Ku T, Jordan CJ, Bonifazi A, Xi ZX . New Drugs, Old Targets: Tweaking the Dopamine System to Treat Psychostimulant Use Disorders . Annu Rev Pharmacol Toxicol . 61 . 1. 609–628 . January 2021 . 33411583 . 9341034 . 10.1146/annurev-pharmtox-030220-124205 .
- Rahimi O, Cao J, Lam J, Childers SR, Rais R, Porrino LJ, Newman AH, Nader MA . The Effects of the Dopamine Transporter Ligands JJC8-088 and JJC8-091 on Cocaine versus Food Choice in Rhesus Monkeys . J Pharmacol Exp Ther . 384 . 3 . 372–381 . March 2023 . 36507847 . 9976790 . 10.1124/jpet.122.001363 . However, JJC8-016 failed cardiac safety tests by exhibiting relatively high affinity at hERG channels; thus, this analogue was abandoned from further development..
- Lee KH, Fant AD, Guo J, Guan A, Jung J, Kudaibergenova M, Miranda WE, Ku T, Cao J, Wacker S, Duff HJ, Newman AH, Noskov SY, Shi L . Toward Reducing hERG Affinities for DAT Inhibitors with a Combined Machine Learning and Molecular Modeling Approach . J Chem Inf Model . 61 . 9 . 4266–4279 . September 2021 . 34420294 . 9593962 . 10.1021/acs.jcim.1c00856 . From this validation set of DAT inhibitors, we noticed that a pair of analogues with similar chemical structures, JJC8-01646 and JJC8-08813 (Tanimoto similarity = 0.62, Figure S6), have opposite trends of affinities at DAT and hERG. JJC8-088 has ~90-fold higher affinity than JJC8-016 at DAT (Ki = 2.6 and 234.4 nM, respectively), but has ~2-fold lower affinity than JJC8-016 at hERG (IC50 = 0.13 and 0.06 μM, respectively)..
- Ku TC, Cao J, Won SJ, Guo J, Camacho-Hernandez GA, Okorom AV, Salomon KW, Lee KH, Loland CJ, Duff HJ, Shi L, Newman AH . Series of (([1,1'-Biphenyl]-2-yl)methyl)sulfinylalkyl Alicyclic Amines as Novel and High Affinity Atypical Dopamine Transporter Inhibitors with Reduced hERG Activity . ACS Pharmacol Transl Sci . 7 . 2 . 515–532 . February 2024 . 38357284 . 10.1021/acsptsci.3c00322 . 10863442 . January 5, 2025 .
- Schifano F, Catalani V, Sharif S, Napoletano F, Corkery JM, Arillotta D, Fergus S, Vento A, Guirguis A . Benefits and Harms of 'Smart Drugs' (Nootropics) in Healthy Individuals . Drugs . 82 . 6 . 633–647 . April 2022 . 35366192 . 10.1007/s40265-022-01701-7 . [Modafinil] is widely available for online purchase [105] and it is of interest that a range of modafinil derivatives are actively being discussed on web fora, including: adrafinil, fladrafinil, flmodafinil, and N-methyl-4,4′-difluoro-modafinil [8]. Finally, the modafinil R-enantiomer armodafinil, which is being used to improve wakefulness in patients with excessive sleepiness [106], is currently the subject of an anecdotal debate relating to its properties as a [cognitive enhancer] [107]..
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- Rotolo RA, Dragacevic V, Kalaba P, Urban E, Zehl M, Roller A, Wackerlig J, Langer T, Pistis M, De Luca MA, Caria F, Schwartz R, Presby RE, Yang JH, Samels S, Correa M, Lubec G, Salamone JD . The Novel Atypical Dopamine Uptake Inhibitor (S)-CE-123 Partially Reverses the Effort-Related Effects of the Dopamine Depleting Agent Tetrabenazine and Increases Progressive Ratio Responding . Front Pharmacol . 10 . 682 . 2019 . 31316379 . 6611521 . 10.3389/fphar.2019.00682 . free .
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- Salamone JD, Rotolo RA, Murray F, McNamara B, Presby RE, Yang JH, Correa M . 323.04 / AAA17 - The novel atypical dopamine transport inhibitors CT-005094 and CT-005404 reverse the effort-related motivational effects of the dopamine depleting agent tetrabenazine . November 5, 2018 . Neuroscience 2018 . Society for Neuroscience . The present studies focused on recently synthesized atypical DAT inhibitors, CT-005094 and CT-005404. These compounds bind to DAT with high selectivity relative to the serotonin and norepinephrine transporters, and can elevate extracellular levels of DA as measured by microdialysis without stimulating DA release. In the present studies, CT-005094 and CT-005404 were assessed for their ability to reverse the effort-related motivational effects of tetrabenazine. Rats were tested using the fixed ratio 5/chow feeding choice test. Tetrabenazine (1.0 mg/kg) shifted choice behaviour, decreasing lever pressing and increasing chow intake. CT-005094 was co-administered at doses ranging from 2.0-16.0 mg/kg IP, and the 8.0 mg/kg dose partially but significantly reversed the effects of tetrabenazine. CT-005404 was orally active, and reversed the effects of tetrabenazine in the dose range of 15.0-30.0 mg/kg PO. Atypical DAT inhibitors such as CT-005094 and CT-005404 offer potential as a new avenue for drug treatment of motivational dysfunctions in humans..
- Moscoso M, Sanchez S . Society for Neuroscience – 48th Annual Meeting. San Diego, California, USA – November 3–7, 2018 . Drugs of the Future . 44 . 1 . 2019 . 10.1358/dof.2019.44.1.2954217 . 93 . The assessment of two other modafinil-based atypical DAT inhibitors, CT-005404 and CT-0050904, in the reversal of the [...].
- Salamone JD, Correa M . The Neurobiology of Activational Aspects of Motivation: Exertion of Effort, Effort-Based Decision Making, and the Role of Dopamine . Annual Review of Psychology . 75 . 1. 1–32 . January 2024 . 37788571 . 10.1146/annurev-psych-020223-012208 . 10234/207207 . free .
- Rotolo RA, Presby RE, Tracy O, Asar S, Yang JH, Correa M, Murray F, Salamone JD . The novel atypical dopamine transport inhibitor CT-005404 has pro-motivational effects in neurochemical and inflammatory models of effort-based dysfunctions related to psychopathology . Neuropharmacology . 183 . 108325 . February 2021 . 32956676 . 10.1016/j.neuropharm.2020.108325 .
- Konofal E . From past to future: 50 years of pharmacological interventions to treat narcolepsy . Pharmacol Biochem Behav . 241 . 173804 . August 2024 . 38852786 . 10.1016/j.pbb.2024.173804 . Among these advancements is lauflumide (NLS-4), a forward step from earlier substances initially envisioned by Lafon Laboratories yet not realized (Dowling et al., 2017). Developed by NLS Pharmaceutics AG, lauflumide represents a cutting-edge development as a selective dopamine reuptake inhibitor. It is an enantiomerically pure R-isomer, with an enantiomeric excess exceeding 95 %, of a bis(p-fluoro) phenyl ring-substituted derivative of modafinil, showcasing the innovative work of inventor Eric Konofal (USPTO Patent 2017, US9637447B2) (Konofal, 2017). Unlike modafinil, which induces hepatic enzyme activity with repeated doses, lauflumide does not act as an inducer of cytochrome P450 (CYP) enzymes, including CYP3A4/5. In mouse models, lauflumide has demonstrated potent wake-promoting effects without the risk of hypersomnia rebound (unpublished data). Moreover, the recovery sleep following lauflumide administration is marked by a reduced amount of NREM sleep and delta wave activity, indicating a decreased need for recovery sleep despite extended periods of wakefulness induced by the drug (Luca et al., 201).. free .
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