AF40431 is the first reported small-molecule ligand of sortilin (IC50: 4.4 µM; Kd: 0.7 µM). AF40431 is bound in the neurotensin-binding site of sortilin.
NTRC-824 is >150-fold selectivity for NTS2 over NTS1 (Ki >30 μM). NTRC-824 is an effective, selective, and neurotensin-like nonpeptide neurotensin receptor type 2 (NTS2) antagonist (IC50: 38 nM and a Ki : 202 nM).