1,3-Cyclooctanedione, 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-cyclooctanedione (all-E)- 2-Retinylidene-1,3-cyclooctanedione, trans- 73685-26-4 WH08 all-trans-2-Retinylidene-1,3-cyclooctanedione