- 3-Phenyl-substituted imidazo[1,5-alpha]quinoxalin-4-ones and imidazo[1,5-alpha]quinoxaline ureas that have high affinity at the GABAA/benzodiazepine receptor complex. Jacobsen, E.J., Stelzer, L.S., Belonga, K.L., Carter, D.B., Im, W.B., Sethy, V.H., Tang, A.H., VonVoigtlander, P.F., Petke, J.D. J. Med. Chem. (1996)