2H-1-Benzopyran-3,4,5,7-tetrol,2-[[2-(3,4-dihydroxyphenyl)-3,4-dihydro-5,7-dihydroxy-2H-1-benzopyran-3-yl]oxy]-3,4-dihydro-2-(4-hydroxyphenyl)-
CAS No. 18894-72-9