(1E,4E)-1,5-diphenylpenta-1,4-dien-3-one 1,4-pentadien-3-one, 1,5-diphenyl-, (1E,4E)- InChI=1/C17H14O/c18-17(13-11-15-7-3-1-4-8-15)14-12-16-9-5-2-6-10-16/h1-14H/b13-11+,14-12