has role is deprotonated form of methyl ester cocaine A tropane alkaloid obtained from leaves of the South American shrub <em>Erythroxylon coca</em>. central nervous system stimulant sympathomimetic agent adrenergic uptake inhibitor xenobiotic benzoate ester local anaesthetic tropane alkaloid sodium channel blocker vasoconstrictor agent serotonin uptake inhibitor tertiary amino compound dopamine uptake inhibitor cocaine(1+) mouse metabolite plant metabolite environmental contaminant