A non-specific inhibitor of 5-HT reuptake , imipramine , did not produce this amnesic effect , nor did the combination of fenfluramine with the MAOI tranylcypromine , although it produced , as expected , the " serotonergic syndrome . " Results for the metabolic precursor of 5-HT , 5-HTP , also administered peripherally , were inconsistent , with amnesic effects seen at 5 and 20 mg/kg but none at 10 mg/kg .
Manipulations of 5-HT activity and memory in the rat. The activity of 5-HT was manipulated by means of the peripheral injection of 5-HT reuptake inhibitors, fenfluramine and fluoxetine. These drug treatments, at doses higher than 1 mg/kg, produced retrograde amnesia in a one-trial appetitive learning task in rats. A non-specific inhibitor of 5-HT reuptake , imipramine , did not produce this amnesic effect , nor did the combination of fenfluramine with the MAOI tranylcypromine , although it produced , as expected , the " serotonergic syndrome . " Results for the metabolic precursor of 5-HT , 5-HTP , also administered peripherally , were inconsistent , with amnesic effects seen at 5 and 20 mg/kg but none at 10 mg/kg .
### Instruction:
            Given the context about compound efficacy for the given treatment mentioned within the input, mentioned the compounds 
            that can co-occur for the mentioned treatment

            ### Input:
            Manipulations of 5-HT activity and memory in the rat. The activity of 5-HT was manipulated by means of the peripheral injection of 5-HT reuptake inhibitors, fenfluramine and fluoxetine. These drug treatments, at doses higher than 1 mg/kg, produced retrograde amnesia in a one-trial appetitive learning task in rats. A non-specific inhibitor of 5-HT reuptake , imipramine , did not produce this amnesic effect , nor did the combination of fenfluramine with the MAOI tranylcypromine , although it produced , as expected , the " serotonergic syndrome . " Results for the metabolic precursor of 5-HT , 5-HTP , also administered peripherally , were inconsistent , with amnesic effects seen at 5 and 20 mg/kg but none at 10 mg/kg .

            ### Response:
            imipramine, fenfluramine, tranylcypromine
            