"(2E,4E,6E,8E)-3,7-Dimethyl-9-(2,6,6-trimethylcyclohexa-1,3-dien-1-yl)nona-2,4,6,8-tetraenal" . "Dehydroretinal" . . . . . . "3,4-Dehydroretinal; 3,4\u2013Didehydroretinaldehyde" . . . "Dehydroretinal" . . . . . . "dehydroretinal" . . . . . "3-dehydroretinal" . .