Download PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Optically active pyrrolidinylmethylindole analogs related in structure to the benzenesulfonyltryptamine 5-HT 6 receptor antagonist MS-245 were evaluated and their R-isomers were found to bind with affinity higher than their S-enantiomers. ... Chiral analogs of the 5-HT 6 ligand MS-245 (K ...