.alpha.-Retinene 116-31-4 2,4,6,8-Nonatetraenal, 3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-, (all-E)- Axerophthal E-Retinal NSC122757 Retinal Retinal, all-trans- Retinaldehyde Retinene Retinene1 Vitamin A aldehyde Vitamin A1 aldehyde all-E-Retinal all-trans-Retinal all-trans-Retinaldehyde all-trans-Vitamin A aldehyde trans-Retinal trans-Vitamin A aldehyde