All of the following are alpha-adrenergic receptor blockers EXCEPT one. Which one is the exception?

Propranolol (Inderal)

Doxazosin (Cardura)

Phenoxybenzamine hydrochloride (Dibenzyline)

Phentolanine hydrochloride (Regitine)

Prazosin (Minipress)

Terazosrn (Hytrin)