API
IMPURITY
CHEMICAL NAME
STRUCTURE
2
Dexpramipexole

Dexpramipexole Impurity A

(6R)-4,5,6,7-tertrahydro-1,3-benzothiazol-2,6-diamine DexpramipexoleDexpramipexole Impurity A
Dexpramipexole

Dexpramipexole Impurity B

N-[(6R)-2-Amino-4,5,6,7-terthydro-1,3-benxothiazol-6-yl]propanamide DexpramipexoleDexpramipexole Impurity B
Dexpramipexole

Dexpramipexole Impurity C

(S)-4,5,6,7-terahydro-N-6-propyl-2,6-benzothiazolediamine
Dexpramipexole

Dexpramipexole Impurity

(6R)-6-N-ethyl-4, 5, 6, 7-tetrahydro-1,3-benzothiazole-2,6-diamine( Ethyl Dexpramipexole) DexpramipexoleDexpramipexole Impurity
Dexpramipexole

Dexpramipexole Dexpramipexole Impurity

R)-4,5,6,7-tetrahydro-N2,N6-dipropylbenzo[d]thiazole-2,6-diamine DexpramipexoleDexpramipexole Impurity1