enone 51.995 52.03150 An alpha,beta-unsaturated ketone of general formula R(1)R(2)C=CR(3)-C(=O)R(4) (R(4) =/= H) in which the C=O function is conjugated to a C=C double bond at the alpha,beta position. C3OR4 CHEBI:51689 Wikipedia:Enone [*]\C([*])=C(\[*])C([*])=O chebi_ontology enones alpha,beta-unsaturated ketone olefinic compound