Synonyms: Methyl (2R)-(2-Chlorophenyl)[6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl]acetate Hydrogen Sulfate, Clopidogrel Hydrogen Sulfate Imp. C (EP) as Hydrogen Sulfate, (R)-Clopidogrel Hydrogen Sulfate, Thieno[3,2-c]pyridine-5(4H)-acetic acid, α-(2-chlorophenyl)-6,7-dihydro-, methyl ester, (αR)-, sulfate (1:1), (R)-(-)-Methyl (2-chlorophenyl)(6,7-dihydro-4H-thieno[3,2-c]pyrid-5-yl)acetate bisulfate, (R)-(-)-Methyl 2-(2-chlorophenyl)-2-(6,7-dihydro-4H-thieno[3,2-c]pyridin-5-yl)acetate hydrogen sulfate, (R)-Clopidogrel bisulfate, SR 25989C