ketone 27.995 A compound in which a carbonyl group is bonded to two carbon atoms: R2C=O (neither R may be H). CHEBI:13427 CHEBI:13646 CHEBI:17087 CHEBI:24974 CHEBI:6127 CHEBI:8742 COR2 KEGG:C01450 Keton Ketone R-CO-R' Wikipedia:Ketone [*]C([*])=O a ketone cetone chebi_ontology ketones ketones carbonyl compound