Imuracetam
UCB-G218 (CAS 67542-41-0)
Imuracetam is a discontinued, never-marketed racetam with a unique bis-pyrrolidone urea structure. Its nootropic effects were never established and it remains a historical footnote in racetam research.
Formula
C₁₁H₁₈N₄O₃
Category
Racetam / Bis-pyrrolidone
Molar Mass
254.29 g/mol
Legal Status
Unscheduled, never marketed
Chemical Profile
Mechanism of Action
No published mechanism studies. Presumed racetam-like action via facilitation of synaptic communication or neuroplasticity, but research is lacking.
Preclinical Evidence
1970s–90s Literature Mentions Only
Imuracetam is mentioned in chemical and pharmacology dictionaries as a racetam class experimental cognitive modifier, but no modern animal or human data are published.
Psychotropic Activity Reference
A 1998 study gives brief mention to potential psychotropic actions of new pyrrolidone/ racetam derivatives including Imuracetam, but does not provide standalone efficacy data for the parent compound.
Safety & Side Effects
No animal, toxicology, or clinical safety information has been published.
Regulatory & Legal Status
US/EU/International
- Never scheduled, not FDA or EU approved
- Not controlled, not authorized for clinical use
- Only as a research chemical in chem catalogs, if at all
Note: Imuracetam is not approved for any use, and is only of historical and chemical curiosity.
History
Developed and patented in the 1970s, then briefly tracked in pharmaceutical dictionaries, Imuracetam has not been researched in the modern era.
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Benefits
- Unique bis-pyrrolidone urea structure
- Historical value for racetam classification
- Scientific curiosity—nootropic chemistry
Considerations
- No animal or human research data
- Never marketed/approved
- Research only, not for human use
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Scientific References
- Ganellin, C.R., & Triggle, D.J., editors. Dictionary of Pharmacological Agents. Vol. 3. CRC Press, 1996.
- Elks, J. The Dictionary of Drugs: Chemical Data, Structures and Bibliographies. Springer, 2014, p. 681.
- Avetisyan, S.A., et al. "Synthesis and psychotropic activity of new 2-pyrrolidone derivatives." Pharmaceutical Chemistry Journal, vol. 32, no. 2, 1998, pp. 55–58. https://doi.org/10.1007/BF02464161.
Information is for educational, historical and research reference only. Not for clinical or human use. Last updated: 5/11/2025.