4H-1-Benzopyran-4-one,2-(3,4-dihydroxyphenyl)-2,3-dihydro-7,8-dihydroxy-

4H-1-Benzopyran-4-one,2-(3,4-dihydroxyphenyl)-2,3-dihydro-7,8-dihydroxy- · CAS 489-73-6