1,7-Diphenylheptan-3-one 3-heptanone, 1,7-diphenyl- InChI=1/C19H22O/c20-19(16-15-18-11-5-2-6-12-18)14-8-7-13-17-9-3-1-4-10-17/h1-6,9-12H,7-8,13-16H