2,3:6,7-Dibenzosuberen-4-on-1 2,3:6,7-Dibenzotropone 2222-33-5 4-07-00-01737 (Beilstein Handbook Reference) 5-Dibenzosuberenone 5H-DIBENZO(A,D)CYCLOPENTEN-5-ONE 5H-Dibenzo(a,d)cyclohepten-5-one 5H-Dibenzo(a,d)cycloheptenone BRN 0743171 Dibenzo(a,d)cyclohepten-5-one Dibenzo(b,f)cyclohepten-1-one Dibenzosuberenone EINECS 218-737-3 NSC 86151