Not Less Than - 95%
De-O-ethoxy Tamsulosin; Desethoxy Tamsulosin; Tamsulosin Desethoxy Impurity;2-Methoxy-5-[(R)-2-[(2-phenoxyethyl)amino]propyl]-benzenesulfonamide; 2-methoxy-5-[(2R)-2-[(2-phenoxy ethyl) amino] propyl]benzene sulfonamide;