(4E,6E)-1-(3,4-dihydroxyphenyl)-7-phenylhepta-4,6-dien-3-one 4,6-heptadien-3-one, 1-(3,4-dihydroxyphenyl)-7-phenyl-, (4E,6E)- InChI=1/C19H18O3/c20-17(9-5-4-8-15-6-2-1-3-7-15)12-10-16-11-13-18(21)19(22)14-16/h1-9,11,13-14,21-22H,10,12H2/b8-4+,9-5