2-(3,4-Dihydroxyphenyl)-1-(2,3,4-trihydroxyphenyl)ethanone 57165-58-9 Ethanone, 2-(3,4-dihydroxyphenyl)-1-(2,3,4-trihydroxyphenyl)- beta-(3,4-Dihydroxyphenyl)-2,3,4-trihydroxyacetophenone