Clopidogrel Thienylethyl Impurity (HCl salt) ;
(S)-2-Chloro-alpha-[[2-(2-thienyl)ethyl]amino]benzeneacetic acid methyl ester HCl ;
CAS # 141109-20-8 (base) ; CAS # 141109-19-5 (HCl salt) ;
C15H16ClNO2S (base) ; MW: 309.81 ;
C15H17Cl2NO2S (HCl salt) ; MW: 346.27 ;