Eplerenone-d3 is the deuterium labeled Eplerenone. Eplerenone (Epoxymexrenone) is a selective, competitive and oreally active aldosterone antagonist with an IC50 of 138 nM. Eplerenone has low affinity for progesterone, androgen, estrogen and glucocorticoid receptors. Eplerenone can be used for hypertension and heart failure after myocardial infarction reserch[1][2].