Cardenolides [Chemical/Ingredient] C0007143 C(23)-steroids with methyl groups at C-10 and C-13 and a five-membered lactone at C-17. They are aglycone constituents of CARDIAC GLYCOSIDES and must have at least one double bond in the molecule. The class includes cardadienolides and cardatrienolides. Members include DIGITOXIN and DIGOXIN and their derivatives and the STROPHANTHINS. N0000007543 Cardenolides D002298 M0003448 2078 Cardenolides C25442 Cardiac Glycosides [Chemical/Ingredient]