+

Synthesis and Resolution of cis -(±)-Methyl (1 R ,2 S /1 S ,2 R )-2-[(4-Hydroxy-4-phenylpiperidin-1-yl)methyl]-1-(4-methylphenyl)cyclopropanecarboxylate [(±)-PPCC)]: New σ Receptor Ligands with Neuroprotective Effect