The present invention relates to a novel process for the manufacture of blood-platelet aggregation inhibiting agent. In particular, the present invention is directed to a process for the manufacture of Methyl-(+)-(S)-α-(2-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-S-(4H)acetate bisulfate Form-I.Linvention concerne un procédé nouveau de préparation dun agent inhibiteur de lagrégation des plaquettes sanguines. En particulier, linvention concerne un procédé de préparation de bisulfate de méthyl-(+)-(S)-a-(2-chlorophényl)-6,7-dihydrothiéno[3,2-c]pyridine-5-(4H)acétate de forme I.
