Nebivolol Standard

(1RS)-1-[(2RS)-6-Fluoro-3,4-dihydro-2H-1-benzopyran-2-yl]-2-[[(2RS)-2-[(2SR)-6-fluoro-3,4-dihydro-2H-1-benzopyran-2-yl]-2-hydroxyethyl]amino]ethan-1-ol; Nebilet; Nodon;