1,3-Cyclopentanedione, 2-(3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenylidene)-, (all-E)- 2-(3,7-Dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenylidene)-1,3-cyclopentanedione (all-E)- 2-Retinylidene-1,3-cyclopentanedione, trans- 70359-69-2 all-trans-2-Retinylidene-1,3-cyclopentanedione