it was found that after subcutaneous injections of large doses , l-noradrenaline , l-alpha-methyl-noradrenaline , dl-alpha-methyl-dopamine , l-alpha-methyl-dopa and 5-hydroxytryptamine could cross the blood-brain barrier of newborn to 2 week old rats and be taken up by neurones normally containing monoamine as well as by several neurones which normally contained no monoamine.3 .
C0028351
l-noradrenaline
C0025805
alpha-methyl-noradrenaline