with the aim of investigating whether exogenous noradrenaline ( na ) and adrenaline ( a ) can modulate transmitter release via the stimulation of presynaptic beta-adrenoceptors , 3h-release from isolated portal veins was studied after pretreatment with 3h-1-na , phenoxybenzamine , desipramine and normetanephrine .
C0014563
adrenaline
C0028351
na