the stimulation observed with epinephrine , norepinephrine , or isoproterenol was blocked by d , l- and l-propranolol ( 2 times 10 ( -4 ) m ) but not by d-ropranolol ( 2 times 10 ( -4 ) m ) or phentolamine ( 9 times 10 ( -4 ) m ) .
C0014563
epinephrine
C0028351
norepinephrine