Limonianin (Atalantoflavone) is a flavone, that can be isolated from Erythrina sigmoidea and the root bark of Citrus limonia. Limonianin presents inhibitory effect against P. gingivalis. Limonianin shows cytotoxic activity against multidrug-resistant (MDR) cancer cell lines[1][2].
References:
[1]. Posri P, et al. A new flavonoid from the leaves of Atalantia monophylla (L.) DC. Nat Prod Res. 2019 Apr;33(8):1115-1121.
[2]. Niquini, et al. On the conformation, molecular interactions and electron density of a natural flavonoid derivative. Journal of Molecular Structure, 2020, 1220(1).