(Rac)-Nebivolol -d 2 , 15 N is 15 N and deuterated labeled (Rac)-Nebivolol. (Rac)-Nebivolol ((Rac)-R 065824) is a racemic isomer of Nebivolol. Nebivolol is a selective β1-adrenergic receptor antagonist with an IC 50 value of 0.8 nM. Nebivolol can prevent up-regulation of Nox2/NADPH oxidase and lipoperoxidation in the early stages of ethanol-induced cardiac toxicity. Vasodilatory activity.