Clopidogrel Hydrogen Sulfate - Impurity D

Methyl (2R)-(2-Chlorophenyl)[(2S)-(2-chlorophenyl)[6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl]acetyloxy]
acetate; (S)-(R)-1-(2-Chlorophenyl)-2-methoxy-2-oxoethyl 2-(2-chlorophenyl)-2-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)acetate;(1R)-1-(2-Chlorophenyl)-2-methoxy-2-oxoethyl (2S)-2-(2-chlorophenyl)-2-(6,7-dihydrothieno[3, 2-c]pyridin-5(4H)-yl)acetate;