2,6-Dimethyl-2,5-heptadien-4-onePhoronePhoroneDiisopropylidene acetonesym-Diisopropylideneacetone2,6-Dimethyl-2,5-heptadien-4-one2,6-dimethylhepta-2,5-dien-4-one对称-二异亚丙基丙酮2,6-二甲基-2,5-庚二烯-4-酮佛尔酮phoroneDiisobutenyl ketoneDiisopropylidene acetone2,5-Heptadien-4-one, 2,6-dimethyl-s-Diisopropylidene acetonesym-Diisopropylidene acetone