Dryocrassin ABBA (Dryocrassin) is a flavonoid natural product derived from Dryopteris crassirhizoma, with antiviral and antibacterial activities.

Filixic acid ABA exhibits inhibitory effects on neuraminidase of influenza virus H5N1 with IC50 as 29.57 ± 2.48 μM, it may have anti-influenza virus activity.

Albaspidin AA exhibits strong antibacterial activity against the vegetative form of P. larvae (MIC: 0.168-220 uM) and may possess in vitro nematocidal activity against L4 stage larvae.

Albaspidin-AP, -PP, -PB inhibit Fatty acid synthase (FAS) with IC50 values ranging from 23.1+ -1.4 to 71.7+ -3.9 microM, they could be considered to be a promising class of FAS inhibitors, and FAS is emerging as a potential therapeutic target to treat can

Pseudoaspidin is isolated from fern plants.