carboxamide organic molecular entity enamide 0 65.998 66.03820 An alpha,beta-unsaturated carboxylic acid amide of general formula R(1)R(2)C=CR(3)-C(=O)NR(4)R(5) in which the amide C=O function is conjugated to a C=C double bond at the alpha,beta position. C3NOR5 CHEBI:51751 [*]\C([*])=C(\[*])C(=O)N([*])[*] chebi_ontology enamides