US Patent 7,091,249
United States Patent and Trademark Office
University of Iowa Research Foundation (Iowa City, IA, US)
Spinal anesthetics for intrathecal administration to produce spinal anesthesia are provided with use of 6-[2-(1(2)H-tetrazole-5-yl)ethyl]decahydroisoquinolone-3-carboxylic acid or a pharmaceutically active analogue or its pharmaceutically active analogs.
Brennan, Timothy J. Drugs for spinal anesthesia. US Patent 7,091,249 filed December 26, 2001 and issued August 15, 2006. https://ir.uiowa.edu/patents/405