Behavioral comparisons of R-2-amino-1-(2,5-dimethoxy-4-methylphenyl) butane (BL-3912A) with R-DOM and S-amphetamine.

The behavioral effects of R-2-amino-1-(2,5-dimethoxy-4-methylphenyl) butane or BL-3912A were compared with those of S-Amphetamine and R-DOM. BL-3912A facilitated acquisition of shuttle box responding by rats without increasing noncontingent intertrial (ITI) activity, while S-Amphetamine increased both avoidance and ITI responding. R-DOM had a biphasic effect on avoidance responding, increasing it at low doses and disrupting at higher doses. At doses that facilitated shuttle box responding, BL-3912A had no effect on unacclimated motor activity of rats nor on the rate of continuous avoidance responding by rats. S-Amphetamine increased the frequency of both motor activity and operant avoidance responding, while R-DOM decreased motor activity and increased operant avoidance responding. By facilitating avoidance behavior without increasing othermeasures of psychomotor activity, BL-3912A represents a unique psychopharmacological agent clearly different from R-DOM and S-Amphetamine.