Nebivolol hydrochloride. Molecular model of the drug nebivolol hydrochloride (C22.H25.F2.N.O4?H.Cl). This medication, sold under the brand name of Bystolic, is a beta1 receptor blocker with nitric oxide-potentiating vasodilatory effect used in treatment of hypertension and also for left ventricular failure. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (dark blue), oxygen (red), fluorine (light blue) and chlorine (green).