Divaplon is one of a series of imidazopyrimidine derivatives, which are benzodiazepine receptor ligands. This compound exhibits anxiolytic and anticonvulsant activity but little or no sedative/myorelaxant effects. Divaplon occupied a large percentage of benzodiazepine receptors, as measured with an in vivo binding technique, without inducing any deficit in a rotating drum task in mice, and it is suggested that divaplon is a partial agonist at GABA receptors. No significant anticonvulsant tolerance was seen with the divaplon.