Idazoxan hydrochloride (RX 781094) is a benzodioxane-linked imidazole. It has alpha-2 adrenoceptor antagonist activity.

Deriglidole (SL 86-0715) is a peripheral adrenergic receptor antagonist that is a selective inhibitor of alpha2 receptors. Deriglidole inhibits colistin and Idazoxan but does not show activity against prazosin and rat cortical and human platelet α2-adrenergic receptors.

L-Albizziin (2-Methoxyidazoxan monohydrochloride) is a highly potent selective antagonist of the alpha 2r adrenergic receptor, with little or no antagonistic effect on imidazoline. It has a significantly higher affinity for the alpha 2D adrenergic receptor (pKd9.7) in guinea pigs than for the alpha 2A adrenergic receptor (pKd8.2) in rabbits.

Ethoxyidazoxan is a potent and highly selective alpha 2-adrenergic receptor antagonist.