OSL09: Olsalazine EP Impurity I

5-Decarboxy-3-(3-aboxy-4-hydroxy)phenylazo Olsalazine ;

3,3′-[4-Hydroxy-1,3-phenylenebis(diazenediyl)]-bis(6-hydroxybenzoic) acid ;

C20H14N4O7 ;
Mol. Wt.: 422.35 ;