we have investigated the effect of various penetration enhancers on the in vitro and in vivo percutaneous absorptions of catecholamine analogs , i.e . levodopa ( ld ) , dopamine hydrochloride ( dph ) and isoproterenol hydrochloride ( iph ) , as model water-soluble drugs .
C0007412
catecholamine
C0282151
dopamine hydrochloride