5-[2-[[2-(2-Ethoxyphenoxy)ethyl]amino]propyl]-2- methoxybenzenesulfonamide ; (±)-Tamsulosin ; Racemic Tamsulosin ; Tamsulosin Racemate;Tamsulosin Hydrochloride Racemate;Benzenesulfonamide, 5-[2-[[2-(2-ethoxyphenoxy)ethyl]amino]propyl]-2-methoxy-; Tamsulosin Racemate (R and S isomer) IP Impurity