1-Butanone, 1-(3,4-dihydroxyphenyl)- (9CI) 17386-89-9 3',4'-Dihydroxybutyrophenone 4-08-00-01864 (Beilstein Handbook Reference) 4-Butyroylpyrocatechol BRN 2255748 BUTYROPHENONE, 3',4'-DIHYDROXY-