Table 5.

Antiviral species and mechanisms of PH.

Active compositions	Antiviral species	Mechanisms	Ref.
the ethyl acetate portion	Anti-porcine pseudorabies virus	Inhibited virus proliferation, directly inactivated viruses, and produced antiviral effects, with dose-dependent manner.	Lu et al. 2021
the n-butanol portion	Anti-porcine reproduction and anti-respiratory syndrome virus in vitro	Inhibit the synthesis and release of virus, and directly kill the virus to control the proliferation of virus on cells.	Zhou et al. 2020