1973461-14-1

(6S)-N6-[3-[[(6S)-2-Amino-4,5,6,7-tetrahydro-6-benzothiazolyl]amino]-1-ethyl-2-methylpropyl]-4,5,6,7-tetrahydro-2,6-benzothiazolediamine can be obtained from (-)-2-Amino-6-propionamido-tetrahydrobenzothiazole (A628150) and is the byproduct of process for the preparation of pramipexole and salts thereof by reductive amination of (diamino)tetrahydrobenzothiazole with propanal. It is also a Pramaxo Impurity C.