TLX agonist 1 (CCRP2, SUN23314) is a modulator of orphan nuclear receptor tailless (TLX, NR2E1) with EC50 of 1.0 μM and Kd of 650 nM. TLX agonist 1 (CCRP2, SUN23314) binds to recombinant TLX protein and enhances TLX transcriptional repressive activity.