the apparent ki values of 7 x 10 ( 6 ) , 5.3 x 10 ( -6 , and 9 x 10-6 ) m calculated from lineweaver-burke plots when dopamine , norepinephrine , and epinephrine , respectively , were used as substrate , showed that this drug is the most potent inhibitor of comt yet known .
C0028351
norepinephrine
C0014563
epinephrine