Neoflavones are compounds with a 4-phenyl-2$H$-1-benzopyran-2-one (4-phenyl-2$H$-chromen-2-one) skeleton 11. They may be substituted.
Source: PAC, 2018,
90, 1429. (
Nomenclature of flavonoids (IUPAC Recommendations 2017)) on page 1433 [
Terms] [
Paper]