the effects of atenolol ( 2-5 mmol/l ) , sotalol ( 1-2 mmol/l ) and pamatolol ( 0.1-1 mmol/l ) , together with n-tertiary butyl phenoxypropanolamines with o-methyl ( d-2t : 50-100 mumol/l ) m-methyl ( d-3t : 50-100 mumol/l ) and p-methyl ( d-4t : 100-200 mumol/l ) group as well as with o , p-methyl groups ( d-24t ) ( 50-100 mumol/l ) on action potentials ( aps ) were investigated in isolated guinea-pig papillary muscles .
C0004147
atenolol
C1563753
phenoxypropanolamines