1,2-Dihydroxy-3-(1-naphthoxy)propane;3-(1-Naphthalenyloxy)-1,2-propanediol;3-(1-Naphtyloxy)propane-1,2-diol;Propanolol glycol;3-(naphthalen-1-yloxy)propane-1,2-diol;Propranolol iMpurity A, diol derivative;3-(1-Naphthyloxy)-1,2-propanediol;Propranolol Impurity A