the effects of digitoxin , 3 alpha-methyl-digitoxigenin-3 beta-monoglucoside ( 3 alpha-mdm ) , 3 alpha-methyl-digitoxigenin ( 3 alpha-md ) , proscillaridin , 4 , 5-methylene-procillaridin ( 4 , 5-mp ) , and 3 beta-hydroxy-4 , 5-methylene-a , b-trans-scillarenin ( 3 beta-hmts ) on force of contraction and on the transmembrane action potentials were examined in isolated papillary muscles of guinea-pigs .
C0012258
digitoxin
C0012257
digitoxigenin