Identification of N -[(5-{[(4-Methylphenyl)sulfonyl]amino}-3-(trifluoroacetyl)-1 H -indol-1-yl)acetyl]- l -leucine (NTRC-824), a Neurotensin-like Nonpeptide Compound Selective for the Neurotensin Receptor Type 2

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Compounds acting via the neurotensin receptor type 2 (NTS2) are known to be active in animal models of acute and chronic pain. To identify novel NTS2 selective analgesics, we searched for NTS2 selective nonpeptide compounds using a FLIPR assay and identified the title compound (NTRC-824, 5) that, to our knowledge, is the first nonpeptide that is selective for NTS2 versus NTS1 and behaves like the endogenous ligand neurotensin in the functional assay.