1,4-Pentadien-3-one, 1,5-diphenyl- 1,5-Diphenyl-3-pentadienone 1,5-Diphenylpenta-1,4-dien-3-one 538-58-9 AI3-00896 Bis(2-phenylvinyl) ketone Dibenzalacetone Dibenzylideneacetone Distyryl ketone EINECS 208-697-5 NSC 117234 Styrol ketone