1-Chloroethylcyclohexyl-d11 Carbonate is used in the synthesis of Candesartan Cilexetil-d11 (C175582), the labeled analogue of Candesartan Cilexetil (C175580), an ester prodrug; hydrolized in vivo to the active carboxylic acid. Used in treatment of congestive heart failure. Antihypertensive.