Pramipexole?impurity?16/Pramipexole?EP?Impurity?B?DiHCl/N2-Propyl?Pramipexole?DiHCl/(S)-2-Propylamino-4,5,6,7-tetrahydro-6-(propylamino)benzothiazole?dihydrochloride;Pramipexole EP Impurity B DiHCl;Pramipexole Impurity B DiHCl;2-N-Propyl Pramipexole Dihydrochloride