the effects of endothelin ( 0.1-1 nmol/l ) and the phorbol ester , phorbol 12-myristate 13-acetate ( pma , 0.1-100 nmol/l ) have been studied on vasoconstrictor responses to sympathetic nerve stimulation and noradrenaline in the rabbit isolated ear artery .
C0031586
phorbol ester
C0039654
pma