Troxerutin Impurity 16

2- (3,4-bis (2-hydroxyethoxy) phenyl) -5-hydroxy-7- (2-hydroxyethoxy) -8- (2-hydroxyethyl) -3- (((2S,3R,4S,5S,6R) -3,4,5-trihydroxy-6- ((((2R,3R,4R,5R,6S) -3,4,5-trihydroxy-6-methyltetrahydro-2H-pyran-2-yl) oxy) methyl) tetrahydro-2H-pyran-2-yl) oxy) -4H-chromen-4-one