PRX-07034 is a selective antagonist of 5-HT6 receptor. It has cognition and memory-enhancing properties and potently decreases food intake and body weight in rodents.?PRX-07034 is both a potent (Ki = 4-8 nM) and highly selective 5-HT(6) receptor antagonist (≥100-fold selectivity for the 5-HT(6) receptor compared to 68 other GPCRs, ion channels, and transporters, except D(3) (Ki = 71 nM) and 5-HT(1B) (Ki = 260 nM) receptors.

DSP-6952 is a novel potent, selective, orally active 5-HT4 receptor partial agonist with Ki of 50-100 nM for human 5-HT4a/4b/4c.

Pindolol is a nonselective β-blocker with partial beta-adrenergic receptor agonist activity, also functions as a 5-HT1A receptor weak partial agonist / antagonist (Ki=33nM).