2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxychromen-4-one; 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-1-benzopyran-4-one; Rutoside Trihydrate - Impurity C (Freebase) (EP/BP); 2-(3,4-Dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one (USP)