S-Clopidogrel N-Methyl Impurity Hydrochloride Clopidogrel Impurity H Clopidogrel N-Methyl Impurity I HCI Clopidogrel Impurity 13/S-Clopidogrel N-Methyl Impurity/Methyl (S)-2-(2-chlorophenyl)-2-(methyl(2-(thiophen-2-yl)ethyl)amino)acetate 2-Chloro-Alpha-[Methyl-[2-(2- Thienyl)Ethyl]Amino]Benzeneacetic Acid Methyl Ester Benzeneacetic acid, 2-chloro-α-[methyl[2-(2-thienyl)ethyl]amino]-, methyl ester, (αS)- (S) - 2 - (2-chlorophenyl) - 2 - (methyl (2 - (thiophene-2-yl) ethyl) amino) acetic acid methyl ester) isopropyl acetate Clopi adduct HCL