Salmeterol USP RC A ; 1-[4-Hydroxy-3-(hydroxymethyl)phenyl]-2-[(4-phenylbutyl)amino] ethanol formate ; CAS # 1798014-51-3 (base) ;

Salmeterol Phenylethoxy Impurity (USP) ; 1-[4-Hydroxy-3-(hydroxymethyl)phenyl]-2-[[6-(2-phenylethoxy)hexyl]amino] ethanol ; CAS # 94749-02-7 ;

1-[4-Hydroxy-3-(hydroxymethyl)phenyl]-2-[[6-(3-phenylpropoxy)hexyl]amino] ethanol formate ; CAS # 94749-11-8 (base) ;

Salmeterol O-Alkyl Impurity (USP) ; CAS # 1391052-04-2 ;

Salmeterol USP RC B ; 1-[4-Hydroxy-3-(hydroxymethyl)phenyl]-2-[[6-(1-methyl-3-phenylpropoxy) hexyl] amino]ethanol ; CAS # 108928-81-0 ;

Salmeterol Deoxy Impurity (USP) ; 1-(4-Hydroxy-3-methylphenyl)-2-[[6-(4-phenylbutoxy)hexyl]amino]ethanol formate ; CAS # 1391054-40-2 (base) ;

Salmeterol Dimer Impurity ; Salmeterol N-Alkyl Impurity (USP) ; CAS # 1391051-88-9 ;

1-Hydroxynaphthalene-2-carboxylic acid ; CAS # 86-48-6 ;

Salmeterol Xinafoate Adduct Impurity ; CAS # 1330076-52-2 ;