Synonyms: Salmeterol Xinafoate Imp. F (EP), (1RS)-1-(4-Hydroxy-3-methylphenyl)-2-[[6-(4-phenylbutoxy)hexyl]amino]ethanol, 4-hydroxy-3-methyl-alpha-[[[6-(4-phenylbutoxy)hexyl]amino]methyl]benzenemethanol, GR 53555X, Ph Eur Salmeterol Impurity F, GR 53555X, Salmeterol Xinafoate Impurity F, Salmeterol Impurity F