norepinephrine , epinephrine , phenylephrine , isoproterenol and terbutaline alone or in combination with various concentrations of the inhibitors , phenoxybenzamine , piperoxan and propranolol , were used to analyze adrenoceptors in strips from the protruding portion of the follicle .
C0028351
norepinephrine
C0014563
epinephrine