US Patent 6,552,064
United States Patent and Trademark Office
University of Iowa Research Foundation (Iowa City, IA, US)
Melatonin (N-acetyl-5-methoxytryptamine), or its biologically active analogues, are used to induce anesthesia.
Attala, Mohamed Naguib Use of melatonin for induction of general anesthesia. US Patent 6,552,064 filed August 10, 2001 and issued April 22, 2003. https://ir.uiowa.edu/patents/327