label: trans-(3)E-3-(3,4-dihydroxybenzylidene)-5-(3,4-dihydroxyphenyl)-4-(hydroxymethyl)dihydrofuran-2(3H)-one
label_lc: trans-(3)e-3-(3,4-dihydroxybenzylidene)-5-(3,4-dihydroxyphenyl)-4-(hydroxymethyl)dihydrofuran-2(3h)-one