Ticagrelor Impurity 72

2- (((3aR,4S,6R,6aS) -6- (7- (((1R,2S) -2- (3,4-difluorophenyl) cyclopropyl) amino) -5- (propylthio) -3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl) -2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl) oxy) ethyl acetate