1-(1-(cyclooctylMethyl)-5-(hydroxyMethyl)-1,2,3,6-tetrahydropyridin-4-yl)-3-ethyl-1H-benzo[d]iMidazol-2(3H)-one hydrochloride

Trap-101 hydrochloride (3, 30, and 300 nM) is inactive per se up to 10 μM, while in the range 3-300 nM, it produces a concentration dependent rightward shift of the concentration-response curve to N/OFQ without modifications of the maximal response to the agonist. Receptor binding affinities of Trap101 (pK _i values) at recombinant human NOP, and classical opioid receptors expressed in CHO cell membranes are 8.65, 6.60, 6.14 and < 5 for NOP, μ-, κ-, and δ-opioid receptors respectively.

pKi: 8.65 (NOP receptor); 6.60 (μ-opioid receptor); 6.14 (κ-opioid receptor); < 5 (δ-opioid receptor)