Benperidol (Anquil) is a butanone analog with antipsychotic and stabilizing properties, and has been shown to be effective in blocking D2 receptors.Benperidol can be used in positron emission tomography (PET) scanning to measure D(2) dopamine receptor binding in vivo.Benperidol has been shown to be effective in blocking D2 receptors in vivo.Benperidol has been shown to be effective in blocking D2 receptors in vivo.