2,3,4,5-tetraphenylcyclopenta-2,4-dien-1-one 2,4-cyclopentadien-1-one, 2,3,4,5-tetraphenyl- InChI=1/C29H20O/c30-29-27(23-17-9-3-10-18-23)25(21-13-5-1-6-14-21)26(22-15-7-2-8-16-22)28(29)24-19-11-4-12-20-24/h1-20