ψ,ψ-carotene, 5,6,9,10,13,14,14',13',10',9',6',5'-hexa-cis(?)-lycopene

(E)-4-octene-2,7-dione

6,10-dimethyl-3E,5E,9-undecatrien-1-yne

3-(5,5-dimethyl-1,3-dioxan-2-yl)but-2-enal

acycloretinal