med 's for this effect by isoproterenol , epinephrine , and norepinephrine were .001 , .01 , and 10 microng/ml ( 4.7 x 10 ( -9 ) , 5.5 x 10 ( -8 ) , and 5.9 x 10 ( -5 ) m ) , respectively .
C0014563
epinephrine
C0028351
norepinephrine