for the following products
(6S)-4,5,6,7-Tetrahydro-benzothiazole-2,6-diamine | (S)-(-)-2,6-Diamino-4,5,6,7-tetrahydrobenzothiazole | (S)-4,5,6,7-Tetrahydro-2,6-benzothiazolediamine | Pramipexole impurity 7 and (6S)-2,6-Diamino-4,5,6,7-tetrahydrobenzothiazole
