3-De(hydroxyMethyl)-3-Methyl SalMeterol;4-Hydroxy-3-Methyl-α-[[[6-(4-phenylbutoxy)hexyl]aMino]Methyl]-1-benzeneMethanol;Salmeterol Xinafoate BP Impurity F;1-(4-Hydroxy-3-methylphenyl)-2-[[6-(4-phenylbutoxy)hexyl]amino]ethanol;Salmeterol Impurity 7(Salmeterol EP Impurity F );Benzenemethanol, 4-hydroxy-3-methyl-α-[[[6-(4-phenylbutoxy)hexyl]amino]methyl]-;Salmeterol Impurity 7(EP Impurity F );Salmeterol EP Impurity F/ Salmeterol Deoxy Impurity