... N O O N N N N NN N N N WO2009/038752-A1 Fig. (1). Representative triazinone structures from Cortex patent filings. Page 3. Recent Advances in the Discovery of Selective AMPAR modulators Current Medicinal Chemistry, 2010 Vol. ... N O O 9 WO2008/143963 N O N O N 10 11 ...