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CAS 62568-57-4) was isolated in 1977 by Schoenenberger, Monnier and colleagues at the University of Basel from the cerebral venous blood of rabbits subjected to hypnogenic electrical stimulation of the intralaminar thalamus, and named for the slow-wave (delta) EEG activity it appeared to enhance after intraventricular infusion in recipient rabbits (Schoenenberger & Monnier, 1977)

However, N-terminal modifications, such as N-acetylation, D-norleucine substitution, or replacement with -aminobutyric acid (GABA), dramatically elongated the peptides half-lives

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Audit traceability and explainability Every step is logged and explainable, so the path from signal to action can be reconstructed on demand, inspection-ready by design rather than reassembled under pressure