Diosmin Impurity 20

4H-1-Benzopyran-4-one,7-[[6-O- (6-deoxy-α-L-mannopyranosyl) -β-D-glucopyranosyl]oxy]-2,3-dihydro-2- (3-hydroxy-4-methoxyphenyl) -5-methoxy-, (2S) -; (S) -2- (3-hydroxy-4-methoxyphenyl) -5-methoxy-7- (((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) chroman-4-one