From: 4-aroylpiperidines and 4-(α-hydroxyphenyl)piperidines as selective sigma-1 receptor ligands: synthesis, preliminary pharmacological evaluation and computational studies
Compound
R
σ1 (K i nM)
σ2 (K i nM)
Selectivity ratio (K i σ2/σ1)
9d
2″-NO2
>434
>854
2
9e
4″-Br
2.95 ± 0.57
289