Email Record: ChemInform Abstract: Methylated Analogues of Methyl (R)-4-(3,4-Dichlorophenylacetyl)-3- (pyrrolidin-1-ylmethyl)piperazine-1-carboxylate (GR-89,696) as Highly Potent ϰ-Receptor Agonists: Stereoselective Synthesis, Opioid-Receptor Affinity, Receptor Selectivity, and Functional Studies (Soukara, Stella)