azaspirodecanedione

[ā′zə-spī′rō-dĕk′ān-dīōn′]
n.
  1. A class of antianxiety agents that are chemically and pharmacologically unrelated to other classes of sedative and anxiolytic drugs.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.