<unk>  (GNTI) is an opioid antagonist used in scientific research which is highly selective for the κ opioid receptor. It is<unk> x more potent and<unk> 00 times more selective than the commonly used κ-opioid antagonist norbinaltorphimine. It has a slow onset and long duration of action, and produces antidepressant effects in animal studies. It also increases allodynia by interfering with the action of the κ-opioid peptide dynorphin.
5'-Guanidinonaltrindole
Chloromorphide
Euflavine
N-Nitroso-N-Methylurea
N-Nitroso-N-methylurea
Bicisate dihydrochloride
Inosine pranobex
Tetrahydrozoline