Ticagrelor impurity 4/Ticagrelor Enantiomer impurity/(1R,2R,3S,5R)-3-[7-[[(1S,2R)-2-(3,4-Difluorophenyl)cyclopropyl]amino]-5-(propylthio)-3H-1,2,3-triazolo[4,5-d]pyrimidin-3-yl]-5-(2-hydroxyethoxy)-1,2-cyclopentanediol

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