(4E,6E)-1-(3,4-dihydroxyphenyl)-7-(4-hydroxyphenyl)-hepta-4,6-dien-3-one (4E,6E)-1-(3,4-dihydroxyphenyl)-7-(4-hydroxyphenyl)hepta-4,6-dien-3-one 4,6-heptadien-3-one, 1-(3,4-dihydroxyphenyl)-7-(4-hydroxyphenyl)-, (4E,6E)- InChI=1/C19H18O4/c20-16(11-7-15-8-12-18(22)19(23)13-15)4-2-1-3-14-5-9-17(21)10-6-14/h1-6,8-10,12-13,21-23H,7,11H2/b3-1+,4-2