Salicylmethylecgonine, (2′-Hydroxycocaine) is a tropane derivative drug which is both a synthetic analogue and a possible active metabolite of cocaine. Its potency in vitro is around 10x that of cocaine, although it is only around three times more potent than cocaine when administered to mice (likely owing to it having a higher LogP: 2.89 than that of cocaine: 2.62) Note however that the compound 2′-Acetoxycocaine would act as a prodrug to Salicylmethylecgonine in humans, and has a more efficient partition coefficient which would act as a delivery system and would circumvent this reason for a loss in potency. Salicylmethylecgonine also shows increased behavioral stimulation compared to cocaine similar to the phenyltropanes. The hydroxy branch renders the molecule a QSAR of a 10-fold increase over cocaine in its binding potency for the dopamine transporter & a 52-fold enhanced affinity for the norepinephrine transporter. It also has a reduced selectivity for the serotonin transporter though only due to its greater increase at NET binding; its SERT affinity being 4-fold increased compared to cocaine. However, in overall binding affinity (not uptake inhibition) it displaces ligands better across the board than cocaine in all monoamine categories.