2,3,7,7-tetramethyl-6,8-dihydro-2H-chromen-5-one

2,6,6-trimethyl-1-phenyl-5,7-dihydroindol-4-one

2,2,7,7-四甲基-2,6,7,8-四氢色烯-5-酮

3-(2-氨基-苯基氨基)-5,5-二甲基-环己-2-烯酮