when total 3h-dihydroalprenolol binding and inhibition of total 3h-dihydroalprenolol binding by ( - ) isoprenaline , ( - ) alprenolol and ( +/- ) cyanopindolol was investigated , it was found that all agents were bound to two classes of saturable binding sites .
C0012278
dihydroalprenolol
C0002334
alprenolol