2,5-二乙基-3,4-二苯基环戊二酮

bicyclo[3.2.2]nona-2,6-dien-4-one

bicyclo[3.2.0]hepta-2,6-dien-4-one

2-苯基-2,4,6-环庚三烯-1-酮

2,7-diphenylcyclohepta-2,4,6-trien-1-one