for the following products
1-(4-(Benzyloxy)-3-(hydroxymethyl)phenyl)-2-(tert-butylamino)ethanol | 4-(Benzyloxy)-alpha-[[tert-butylamino]methyl]-m-xylene-alpha,alpha'-diol | 4-Benzyl albuterol | alpha-[{(1,1-Dimethylethyl)amino}methyl}-4-(phenylmethoxy)-1,3-benzedimethanol and Salbutamol EP Impurity I
