Table 1.

Geographic origin, main plant sources, and chemical compounds [7].

Sr. no.	Geographic origin	Plant source	Main bioactive compounds	Reference
1	Europe, North America, and nontropic regions of Asia	Populus spp., most often P. nigra L.	Polyphenols	[3]
2	Russia	Betula verrucosa Ehrh.	Polyphenols	[3]
3	Brazil	Baccharis spp., predominantly B. dracunculifolia DC.	Prenylated p-coumaric acids, diterpenic acids	[7]
4	Cuba, Venezuela	Clusia spp.	Polyprenylated benzophenones	[89]
5	Pacific region (Okinawa, Taiwan)	Unknown	C-prenylflavanones Furofuran lignans	[90]
6	Canary Islands	Unknown	Furofuran lignans	[15]
7	Kenya	Unknown	Polyphenols	[29, 30]
8	Greece and Cyprus	Unknown	Flavonoids, terpenes	[31]