Glycosides [Chemical/Ingredient] Cardanolides [Chemical/Ingredient] Cardiac Glycosides [Chemical/Ingredient] Cyclopentanophenanthrenes with a 5- or 6-membered lactone ring attached at the 17-position and SUGARS attached at the 3-position. Plants they come from have long been used in congestive heart failure. They increase the force of cardiac contraction without significantly affecting other parameters, but are very toxic at larger doses. Their mechanism of action usually involves inhibition of the NA(+)-K(+)-EXCHANGING ATPASE and they are often used in cell biological studies for that purpose. 2079 M0003451 C26678 Cardiotonic Steroids Cardiac Glycosides C0007158 N0000008157 Cardiac Glycosides D002301 Glycosides [Chemical/Ingredient] Cardanolides [Chemical/Ingredient] Cardiac Glycosides [Chemical/Ingredient] Cyclopentanophenanthrenes with a 5- or 6-membered lactone ring attached at the 17-position and SUGARS attached at the 3-position. Plants they come from have long been used in congestive heart failure. They increase the force of cardiac contraction without significantly affecting other parameters, but are very toxic at larger doses. Their mechanism of action usually involves inhibition of the NA(+)-K(+)-EXCHANGING ATPASE and they are often used in cell biological studies for that purpose. 2079 M0003451 C26678 Cardiotonic Steroids Cardiac Glycosides C0007158 N0000008157 Cardiac Glycosides D002301