An alpha,beta-unsaturated aldehyde of general formula R(1)R(2)C=CR(3)-CH=O in which the aldehydic C=O function is conjugated to a C=C double bond at the alpha,beta position.
| Member | Definition | Role |
|---|
| 2-butenal | An enal consisting of propene having a formyl group at the 1-position. | crotonaldehyde |
| 2-heptenal | A monounsaturated fatty aldehyde that is (2E)-hept-2-ene which is carrying an oxo group at position 1. Found in the peel of Malaysian pink and white pomelo peel and in the scent gland secretion of the rice stink bug Oebalus pugnax. | (E)-hept-2-enal |
| 2-nonenal, (trans)-isomer | A monounsaturated fatty aldehyde that is (2E)-non-2-ene which is carrying an oxo group at position 1. | (E)-non-2-enal |
| 3-methyl-2-butenal | An enal consisting of but-2-ene with a methyl substituent at position 3 and an oxo group at position 1. | 3-methylbut-2-enal |
| 4-hydroxyretinal | A retinoid that is all-trans-retinal carrying a hydroxy substituent at position 4 on the cyclohexenyl ring. | all-trans-4-hydroxyretinal |
| 4-oxo-(e)-2-hexenal | The enal that is (E)-hex-2-enal substituted with an oxo group at C-4. | (E)-4-oxohex-2-enal |
| 4-oxo-2-nonenal | The enal that is (E)-non-2-enal substituted with an oxo group at C-4. | (E)-4-oxonon-2-enal |
| 4,5-epoxy-2-decenal | | trans-4,5-epoxy-2(E)-decenal |
| 4,5-epoxy-2-heptenal | | 3-(3-Ethyloxiranyl)-2-propenal |
| acrolein | An enal that is prop-2-ene with an oxo group at position 1. | acrolein |
| apocarotenal | An apo carotenoid triterpenoid compound arising from oxidative degradation of the beta,beta-carotene skeleton at the 8'-position. | 8'-apo-beta,psi-caroten-8'-al |
| beta-apo-10'-carotenal | An apo carotenoid compound arising from oxidative degradation of the beta,beta-carotene skeleton at the 10'-position. | 10'-apo-beta-carotenal |
| beta-apo-14'-carotenal | | 14'-apo-beta-carotenal |
| citral | A monoterpenoid that is (2E,6E)-octa-2,6-dienal substituted by methyl groups at positions 3 and 7. | geranial |
| integric acid | An eremophilane sesquiterpenoid with anti-HIV-1 activity. It is isolated from Xylaria sp. MF6254. | integric acid |
| methacrylaldehyde | | Methacrolein |
| ophiobolin a | A sesterterpenoid that is ophiobolane with a hydroxy group at position 3, oxo groups at positions 5 and 25, double bonds at positions 7-8 and 19-20, and an oxygen link between positions 14 and 18. | ophiobolin A |
| scalaradial | A scalarane sesterterpenoid with formula C27H40O4. It is a natural product found in the marine sponges Spongia officinalis and Cacospongia mollior, and exhibits anti-inflammatory activity. | scalaradial |
| variecolin | | Variecolin |
| xanthoxin | | 2-cis,4-trans-xanthoxin |