(4E)-1,7-diphenyl-hepta-4-en-3-on DAH-3-Keto-4-en InChI=1/C19H20O/c20-19(16-15-18-11-5-2-6-12-18)14-8-7-13-17-9-3-1-4-10-17/h1-6,8-12,14H,7,13,15-16H2/b14-8