3-ethynyl-2,4,4-trimethylcyclohex-2-en-1-one

2-(4'-oxoretinylidene)-dimedone

all-trans-4-hydroxyretinol

视黄醛

(2E,4E,6E,8E)-9-(3-bromo-2,6,6-trimethylcyclohex-1-en-1-yl)-3,7-dimethylnona-2,4,6,8-tetraenal