(E)-6-(3,4-Dihydroxystyryl)-4-hydroxy-2H-pyran-2-one
(E)-2-(3,5-Dihydroxystyryl)benzene-1,3-diol
(E)-4-(3,5-Dihydroxystyryl)benzene-1,3-diol
(E)-4-(3,5-Dihydroxystyryl)benzene-1,2-diol
