Isoxaben Impurity 9;(2RS)-1-[(1,1-Dimethylethyl)amino]-;Nadolol EP Impurity F as Hydrochloride;(±)-2'-Methylpropranolol Hydrochloride;1-(tert-Butylamino)-3-(1-naphthyloxy)-2-propanol hydrochloride;(2RS)-1-[(1,1- Dimethylethyl)amino]-3-(naphthalen-1-yloxy)-propan-2-ol Hydrochloride