Table 4.

Phytomolecules as inhibitors of SARS-CoV non-structural proteins

Phytomolecule	Class of compound	Source plant	References
SARS-CoV 3CLpro or Mpro inhibitors
Indigo, Sinigrin, and β-sitosterol		Isatis indigotica	[40]
Amentoflavone	Flavonoids	Torreya nucifera	[43]
Ferruginol and savinin	Terpenoid and lignin	Chamaecyparis obtusa var. formosana	[44]
Betulonic acid and Forskolin	Terpene	Juniperus formosana	[44]
SARS-CoV PLpro inhibitors
Tomentin B	Coumarin	Paulownia tomentosa	[45]
Xanthoangelol E	Chalcone	Angelica keiskei	[46]
Theaflavin-3′,3′-digallate	Tannin	Black tea	[10]