<unk>  (INN; trade name Northera; also known as L-DOPS, L-threo-dihydroxyphenylserine, L-threo-DOPS and SM-5688) is a synthetic amino acid precursor which acts as a prodrug to the neurotransmitter norepinephrine (noradrenaline). Unlike norepinephrine,<unk>  is capable of crossing the protective blood–brain barrier (BBB).
Droxidopa
Ciladopa
Carbidopa
Carbidopa/levodopa
Selegiline
Belinostat
Droperidol
Pramipexole