1197-09-7 3',4'-Dihydroxyacetophenone 3,4-DIHYDROXYACETOPHENONE 4-Acetopyrocatechol 4-Acetylpyrocatechol Acetophenone-3',4'-dihydroxy Acetopyrocatechol Ethanone, 1-(3,4-dihydroxyphenyl)- Qingxintong