has role has role dialdehyde malonaldehyde CHEBI:566274 Malonic dialdehyde MDA 1,3-Propanedione malonaldehyde Malondialdehyde Malonyldialdehyde Malonic aldehyde Malonodialdehyde 1,3-Propanedialdehyde A dialdehyde that is propane substituted by two oxo groups at the terminal carbon atoms respectively. A biomarker of oxidative damage to lipids caused by smoking, it exists <em>in vivo</em> mainly in the enol form. chebi_ontology CHEBI:43895 1,3-Propanedial MDD biomarker