1.0 2010-04-08 22:07:55 UTC 2025-11-18 23:06:54 UTC FDB008103 2-Hydroxy-3-methyl-2-cyclopenten-1-one 2-hydroxy-3-methyl-2-cyclopenten-1-one, also known as cyclotene, is a member of the class of compounds known as cyclic ketones. Cyclic ketones are organic compounds containing a ketone that is conjugated to a cyclic moiety. 2-hydroxy-3-methyl-2-cyclopenten-1-one is soluble (in water) and a very weakly acidic compound (based on its pKa). 2-hydroxy-3-methyl-2-cyclopenten-1-one is a caramel, maple, and maple syrup tasting compound and can be found in a number of food items such as pepper (c. annuum), green bell pepper, red bell pepper, and yellow bell pepper, which makes 2-hydroxy-3-methyl-2-cyclopenten-1-one a potential biomarker for the consumption of these food products. 2-Cyclopenten-1-one, 2-hydroxy-3-methyl- 2-Hydroxy-1-methylcyclopenten-3-one 2-Hydroxy-3-methyl-2-cyclopenten-1-one 2-Hydroxy-3-methyl-2-cyclopenten-1-one (Cyclotene) 2-hydroxy-3-methyl-2-cyclopenten1-one (cycloten) 2-Hydroxy-3-methyl-2-cyclopentene-1-one(cyclotene) 2-hydroxy-3-methyl-2-cyclopentenone 2-Hydroxy-3-methylcyclopent-2-en-1-one 2-Hydroxy-3-methylcyclopent-2-enone 2-Hydroxy-3-methylcyclopentenone 3-Methyl-1,2-cyclopentanedione (cyclotene) 3-Methyl-2-cyclopentene-2-ol-1-one 3-Methyl-2-hydroxy-2-cyclopentenone 3-Methylcyclopent-2-en-2-ol-1-one 3-Methylcyclopentane-1,2-dione hydrate Corylon Cycloten Cyclotene (ordorant) Maple lactone C6H8O2 112.1265 112.0524295 2-hydroxy-3-methylcyclopent-2-en-1-one cyclotene 80-71-7 CC1=C(O)C(=O)CC1 InChI=1S/C6H8O2/c1-4-2-3-5(7)6(4)8/h8H,2-3H2,1H3 CFAKWWQIUFSQFU-UHFFFAOYSA-N belongs to the class of organic compounds known as cyclic ketones. These are organic compounds containing a ketone that is conjugated to a cyclic moiety. Cyclic ketones Organic compounds Organic oxygen compounds Organooxygen compounds Carbonyl compounds Aliphatic homomonocyclic compounds Enols Hydrocarbon derivatives Organic oxides Aliphatic homomonocyclic compound Cyclic ketone Enol Hydrocarbon derivative Organic oxide logp -0.19 ALOGPS logs 0.25 ALOGPS solubility 1.98e+02 g/l ALOGPS melting_point 106.5 oC logp 0.77 ChemAxon pka_strongest_acidic 9.34 ChemAxon pka_strongest_basic -3.6 ChemAxon iupac 2-hydroxy-3-methylcyclopent-2-en-1-one ChemAxon average_mass 112.1265 ChemAxon mono_mass 112.0524295 ChemAxon smiles CC1=C(O)C(=O)CC1 ChemAxon formula C6H8O2 ChemAxon inchi InChI=1S/C6H8O2/c1-4-2-3-5(7)6(4)8/h8H,2-3H2,1H3 ChemAxon inchikey CFAKWWQIUFSQFU-UHFFFAOYSA-N ChemAxon polar_surface_area 37.3 ChemAxon refractivity 30.99 ChemAxon polarizability 11.5 ChemAxon rotatable_bond_count 0 ChemAxon acceptor_count 2 ChemAxon donor_count 1 ChemAxon physiological_charge 0 ChemAxon formal_charge 0 ChemAxon Specdb::CMs 2952 Specdb::EiMs 1753 Specdb::MsMs 53934 Specdb::MsMs 53935 Specdb::MsMs 53936 Specdb::MsMs 114660 Specdb::MsMs 114661 Specdb::MsMs 114662 Specdb::MsMs 3604685 Specdb::MsMs 3604686 Specdb::MsMs 3604687 Specdb::MsMs 3604688 Specdb::MsMs 3604689 Specdb::MsMs 3604690 Specdb::NmrOneD 336818 Specdb::NmrOneD 336819 Specdb::NmrOneD 336820 Specdb::NmrOneD 336821 Specdb::NmrOneD 336822 Specdb::NmrOneD 336823 Specdb::NmrOneD 336824 Specdb::NmrOneD 336825 Specdb::NmrOneD 336826 Specdb::NmrOneD 336827 Specdb::NmrOneD 336828 Specdb::NmrOneD 336829 Specdb::NmrOneD 336830 Specdb::NmrOneD 336831 Specdb::NmrOneD 336832 Specdb::NmrOneD 336833 Specdb::NmrOneD 336834 Specdb::NmrOneD 336835 Specdb::NmrOneD 336836 Specdb::NmrOneD 336837 Green bell pepper Type 1 specific Capsicum annuum 4072 Orange bell pepper Type 1 specific Capsicum annuum 4072 Pepper Type 1 specific Capsicum annuum 4072 Red bell pepper Type 1 specific Capsicum annuum 4072 Yellow bell pepper Type 1 specific Capsicum annuum 4072 caramel maple maple syrup smoky