Esmolol-d7 hydrochloride is the deuterium labeled Esmolol hydrochloride (HY-B1392). Esmolol hydrochloride is an ultra-short-acting cardioselective beta1-adrenergic blocker. Esmolol hydrochloride exerts its antiarrhythmic effect by activating Neurokinin 1 Receptoraldose reductase) and the production of advanced glycation end products and promoting fibroblast migration. Esmolol hydrochloride can be used to study cardiac diseases such as arrhythmias and diabetic foot ulcers[1][2][3].