title: Endogenous digitalis: current status and progesterone derivatives as candidates.
mesh_terms: D000818:Animals; D002301:Cardiac Glycosides / Q000494:pharmacology; D004285:Dogs; D066298:In Vitro Techniques; D011374:Progesterone / Q000031:analogs & derivatives* / Q000502:physiology
chemical_list: D002301:Cardiac Glycosides; D011374:Progesterone