Nebivolol EP Impurity C,(1RS)-2-[benzyl[(2RS)-2-[(2RS)-6-fluoro-3,4-dihydro-2H-1-benzopyran-2-yl]-2-hydroxyethyl]amino]-1-[(2SR)-6-fluoro-3,4-dihydro-2H-1-benzopyran-2-yl]ethan-1-ol and (1RS)-2-[benzyl[(2SR)-2-[(2RS)-6-fluoro-3,4-dihydro-2H-1-benzopyran-2-yl]-2-hydroxyethyl]amino]-1-[(2RS)-6-fluoro-3,4-dihydro-2H-1-benzopyran-2-yl]ethan-1-ol,Protected Nebivolol.,Nebivolol Hydrochloride