Fenoterol

Fenoterol EP Impurity A Fenoterol Impurity A:

(1RS)-1-(3,5-Dihydroxyphenyl)-2-[[(1SR)-2-(4-hydroxyphenyl)-1-methylethyl]amino] ethanol Hydrobromide ;  CAS : 38964-10-2 ; C17H22BrNO4 ; Mol. Wt.: 384.26 ;
Fenoterol EP Impurity B Fenoterol Impurity B:

1-(3,5-Dihydroxyphenyl)-2-[[(1RS)-2-(4-hydroxyphenyl)-1-ethylethyl]amino]ethanone ; CAS : 3371-33-3 ; C17H20BrNO4 ; Mol. Wt.: 382.25 ;
Fenoterol EP Impurity C Fenoterol Impurity C:

(1RS)-1-(3,5-Dihydroxyphenyl)-2-[[(1RS)-2-(4-hydroxy-3-methylphenyl)-1-methyl ethyl]amino]ethanol Hydrobromide ; C18H24BrNO4 ; Mol. Wt.: 398.29 ;