Salbutamol EP Impurity I; 4-Benzyl Albuterol

: (1RS)-2-[(1,1-dimethylethyl)amino]-1-[4-(benzyloxy)-3-(hydroxymethyl)phenyl]ethanol; Rosiglitazone Impurity I; α1-[[(1,1-Dimethylethyl)amino]methyl]-4-(phenylmethoxy)-1,3-benzenedimethanol; 1-(4-Benzyloxy-3-hydroxymethyl-phenyl)-2-(tert-butylamino)ethanol;