IUBMB Enzyme Nomenclature
/ EC 1.13.11.24
/ Accepted name:
quercetin 2,3-dioxygenase
...
Quercetin is a flavonol (5,7,3',4'-tetrahydroxyflavonol). ... 3. Bowater, L., Fairhurst, S.A., Just, V.J., and...
http://www.chem.qmul.ac.uk/iubmb/enzyme/EC1/13/11/24.html