Deferasirox bis salicylamide impurity;1-((S)-6-amino-2-(((S)-1carboxy-3-phenylpropyl)amino)hexanoyl)pyrrolidine-2carboxylc cid dihydrate.,1-((S)-6-amino-2-(((S)-1carboxy-3-phenylpropyl)amino)hexanoyl)pyrrolidine-2carboxylc acid dihydrate,Impurity in commercial preparations of Deferasirox,Deferasirox Impurity