abstract |
The present invention relates to clopidogrel hydrogen sulfate, ie methyl (+)-(S) -α- (o-chlorophenyl) -6,7-dihydrothieno [3,2-c] pyridine- of formula (I) A novel process for preparing polymorphs of 5 (4H) -acetate hydrogen sulphate:n n n (I)n n n In particular, the present invention relates to the preparation of Form (I) and amorphous clopidogrel hydrogen sulfate. |