Thioperamide
Thioperamide is a potent HRH4 antagonist and selective HRH3 antagonist capable of crossing the blood–brain barrier . 
<triplet> Thioperamide <subj> HRH4 <obj> physically interacts with <subj> HRH3 <obj> physically interacts with <triplet> HRH4 <subj> Thioperamide <obj> physically interacts with <triplet> HRH3 <subj> Thioperamide <obj> physically interacts with