Table 3.

Naturally occurring compounds as PSs

Class	Name	Structure	λmax	Application	Reference
Perylenequinone	Hypericin		570 nm	Cancer, antimicrobial, in vitro, in vivo	[60]
Perylenequinone	Hypocrellin		470 nm	Cancer, antimicrobial, in vitro, in vivo, clinical	[63]
Flavin	Cationic riboflavin		UVA/440 nm	Antimicrobial, in vitro	[68]
Curcuminoid	Curcumin		420 nm	Antimicrobial, in vitro, in vivo, clinical	[156]