additionally , structure-activity relationships among four cardiotonic steroids were determined by comparing the contractile force effects of bolus i.v . injections of digitoxigenin ( the genin ) , digitoxigenin-galactose ( genin-neutral sugar combination ) , digitoxigenin-aminogalactose ( asi-222 , genin-aminosugar combination ) and digoxin .
C0007158
cardiotonic steroids
C0012265
digoxin