PRE-084 hydrochloride is a selective σ1 agonist with high affinity, rather than over PCP receptors (IC50 > 100000 nM) and several other receptor systems. It was reported that sigma (s) receptor ligands to alleviate learning and memory impairments on several pharmacological and pathological rodent models of amnesia, involving the s1 subtype of s receptor.In vitro: PRE-084 had an IC50 of 44 nM in the receptor assay and an IC50 of more than 100,000 nM for PCP receptors and an IC50 higher than 1 0,000 nM in many other receptor systems. In general, hydroxy-substituted phenyl groups in these compounds like PRE-084 tended to have attenuated potency at a receptors, whereas methylphenyl and chlorophenyl substitutions enhanced potencies. Reduction of cycloalkyl ring size lowered potencies for a receptors and quatemized amine groups invariably decreased the compound’s potencies. [1]. Other sizes are also available. Please inqury us for quote.