Table 2. Sigma Receptor Binding Affinities of Sulfonamide- and Benzylamine Norbenzomorphans.

K_i values reported as an average of two or more independent experiments.

^aCompound previously published.³⁹

^bDiffers from previously published values due to averaging of additional K_i measurements.

^cRatio equal to σ1 K_i/σ2 K_i.