LP 12 hydrochloride is a selective 5-HT7 receptor agonist (Ki=0.13 nM). LP 12 hydrochloride is selective for 5-HT7 over D2, 5-HT1A, and 5-HT2A receptors (Ki values of 224 nM, 60.9 nM, and >1000 nM, respectively).