The molecule is a secondary ammonium ion resulting from the protonation of the secondary amino group of tamsulosin. The major species at pH 7.3. It is a conjugate acid of a tamsulosin. It is an enantiomer of an ent-tamsulosin(1+).
2-(2-ethoxyphenoxy)ethyl-[(2R)-1-(4-methoxy-3-sulfamoylphenyl)propan-2-yl]azanium